Most broadband complaints fail for a boring reason: they are made once, verbally, to the wrong team, and never written down. Providers are not short of unhappy customers shouting into the void; what their systems respond to is a formal complaint with a reference number, a timeline, and a customer who clearly knows the next step. This page is the ladder, rung by rung: how to complain about your broadband provider in a way that gets resolved, how to reach the ombudsman if it is not, and the new six-week timetable that has made escalation quicker than it used to be. If your complaint starts with a fault, confirm it is real first using the tools on the SpeedTestUK homepage; evidence gathered before you complain is worth ten arguments afterwards.
Rung 1: complain formally, in writing, once
Every provider must have a complaints code of practice, published on its website and available on request, setting out how to complain and what happens next. Use it. A formal complaint made through the stated channel (webform, email, letter, or a phone call where you explicitly ask for a complaint to be raised and logged) gets a reference number and enters a tracked process. A grumble to technical support does not.
A good complaint is short, factual and specific about the outcome you want. This structure works:
- Who and what: your name, account number, and one sentence on the problem.
- The timeline: dates of the fault, the calls, the appointments, the promises. Dates are what make a complaint undeniable.
- The impact: what it has cost you, in money, time or missed work, stated plainly.
- The resolution you want: a fix by a date, a refund, compensation, release from contract, an apology. Ask for something concrete; “better service” cannot be granted or refused.
- The next step: note that if the complaint is unresolved you will escalate it to the provider’s ombudsman scheme after six weeks. You are not threatening; you are demonstrating that you know the process.
Keep copies of everything: the complaint itself, the reference, replies, chat transcripts, engineer reports. If the issue involves outages or faults, note what your own checks showed, for example via our broadband outage checker, alongside the provider’s version. Complaints are decided on records, and the side with the better record usually wins.
Rung 2: give them a fair chance, but watch the clock
Providers are required to take prompt, active steps to resolve your complaint and to tell you the outcome they reach. Many complaints do get resolved at this stage, often with a call from a specialist team with more authority than the front line. If you are offered a resolution, you can accept it, reject it, or negotiate; accepting closes the complaint, so do not accept the first offer out of relief unless it genuinely covers your loss.
Know where you stand on automatic compensation too. If your complaint involves a total loss of service, a missed appointment or a late start, fixed payments may already be due to you under Ofcom’s scheme, quite separately from the complaint. Providers occasionally present those automatic payments as generous complaint settlements. They are not; they are entitlements, and your complaint is about everything on top of them. Our automatic compensation article lists the current rates.
BT customers sometimes arrive here looking for the right number rather than a process; if that is you, our page for the phone number for BT customer services covers the contact routes, but the written, referenced complaint described above will serve you better than any phone queue.
Rung 3: the deadlock letter
If you and your provider reach a position where neither will move, you can ask for a deadlock letter (sometimes called a final response). This confirms in writing that the provider has made its final offer and cannot resolve your complaint to your satisfaction. A deadlock letter is valuable because it unlocks the next rung immediately: you no longer have to wait out the remaining weeks before escalating.
Providers do not always volunteer one. If a complaint has clearly stalled, ask for it explicitly, in writing. A provider that refuses to resolve and refuses to issue a deadlock letter is not behaving as its complaints code requires, which is itself worth stating when you escalate.
Rung 4: the ombudsman (ADR), now after six weeks
Every UK broadband provider must belong to one of two Ofcom-approved alternative dispute resolution schemes: CISAS (the Communications and Internet Services Adjudication Scheme) or the Communications Ombudsman (the new name for what many people still call Ombudsman Services: Communications). The split, broadly: BT, EE and Plusnet are with the Communications Ombudsman; Sky, TalkTalk, Virgin Media, Vodafone and NOW are with CISAS. Your provider must tell you which scheme it belongs to, and Ofcom’s ADR schemes page explains both routes and how to check.
The timing changed recently, in your favour. For complaints first raised on or after 8 April 2026, you can go to the ombudsman once six weeks have passed without resolution, down from the previous eight weeks; complaints raised before that date still follow the old eight-week rule. A deadlock letter beats the clock entirely: with one in hand, you can escalate straight away. You generally have up to 12 months from a deadlock letter to bring the case. Ofcom’s statement on the quicker complaints timetable sets out the change and its reasoning: Ofcom found that most complaints resolve within six weeks, and that people left waiting beyond that point were rarely getting a better outcome by waiting longer.
ADR is free for you. The provider pays the scheme’s costs, which is precisely why a credible mention of escalation resolves so many complaints at rung 2: a case that reaches the ombudsman costs the provider money regardless of the outcome.
Preparing your ombudsman submission
When you escalate, you will be asked to set out your case on the scheme’s form. Keep it to the same disciplined shape as the original complaint: what happened, in date order; what you asked the provider to do; what they did or failed to do; and the outcome you are seeking. Attach the evidence bundle rather than describing it: the complaint and reference number, the provider’s replies, the deadlock letter if you have one, bills showing disputed charges, and any test results or fault records. State your losses in numbers where you can, including time spent dealing with the issue, because awards for distress and inconvenience are assessed on the impact you can demonstrate, not the strength of your feelings about it. You do not need a solicitor, and most people do not use one.
Rung 5: what the ombudsman can actually do
The ombudsman reviews the evidence from both sides and issues a decision. If you accept it, the decision becomes binding on the provider (if you reject it, you keep your right to pursue the matter through the courts instead). Remedies can include an apology, corrective action, a refund or bill adjustment, compensation for financial loss, and an award for distress and inconvenience, with total awards of up to £10,000 in the most serious cases, though typical awards are far more modest. The Communications Ombudsman’s broadband disputes page describes the kinds of cases it handles, which include billing, service quality, switching problems and cancellation charges.
Two expectations to set. First, the ombudsman is not instant: expect weeks, not days, for an investigation. Second, it judges fairness and evidence, not frustration. The organised folder from rung 1 is what wins cases here: dates, records, and a clear statement of what you asked for and what the provider did.
Where Ofcom itself fits (and does not)
People often say they will “report the provider to Ofcom”, and are disappointed to learn Ofcom does not investigate individual complaints or order individual remedies. That is the ombudsman’s job. What Ofcom does do is collect complaint reports for monitoring, publish quarterly league tables of the most complained-about providers, and take enforcement action against companies whose behaviour shows a pattern. Logging your experience with Ofcom takes a few minutes and genuinely shapes those tables, so do it as well as, not instead of, the ladder above. If you are choosing a new provider afterwards, the league tables and our guide to UK broadband providers are a sensible pair of reads.
Frequently asked questions
How long should I give my provider before escalating?
For complaints raised on or after 8 April 2026, six weeks from your formal complaint, or immediately if you receive a deadlock letter. Complaints raised before that date follow the old eight-week timetable. Keep proof of the date you first complained; it decides which clock you are on.
Does it cost anything to use the ombudsman?
No. Both ADR schemes are free for consumers. The provider funds the scheme and pays case costs, win or lose, which is one reason providers often settle strong complaints before they get there.
Can the ombudsman make my provider cancel my contract?
Yes, where that is the fair remedy: ombudsman decisions can require a provider to release you from a contract without penalty, refund charges, pay compensation and apologise. If you accept the decision, the provider must comply.
My provider will not give me a deadlock letter. What now?
Ask in writing, and keep the reply. If the complaint simply runs its course unresolved, you can escalate when the six-week (or eight-week, for older complaints) period expires with or without the letter. A refusal to engage properly can be mentioned in your ombudsman submission; schemes take a dim view of it.
Should I stop paying my bill while complaining?
No. Keep paying for the service you are receiving; unpaid bills can damage your credit file and muddy an otherwise strong case. If you believe a charge is wrong, pay under protest and say so in writing, or agree a hold on the disputed amount with the provider as part of the complaint. Disputes are won on evidence, not leverage.
Complain once, properly
The households that get results are rarely the loudest; they are the ones with a reference number, a timeline and a diary date for escalation. Make the complaint in writing, keep everything, and let the timetable work. And if the underlying problem is that your connection never worked properly in the first place, start by verifying it independently: run the checks on our broadband outage checker page and attach the results to your complaint. Providers argue with opinions. They settle with evidence.
