Complain to Tesco Mobile

They have 6 weeks to resolve your complaint. After that, or if they send a 'deadlock' letter, you can escalate to your provider’s ombudsman for free. Ofcom cut this from 8 weeks, so older guides still say 8.

If your provider significantly changes your contract terms (like a price rise above RPI/CPI), you may be able to exit penalty-free within 30 days of being notified.

Only for landline and home broadband, and only from providers signed up to Ofcom’s voluntary automatic compensation scheme. From 1 April 2026 it pays £10.34 for each day a lost service stays unrepaired after two full working days, £32.31 for a missed engineer appointment, and £6.46 a day for a late new service, without you asking. Mobile is not covered, so a mobile outage is a complaint you make yourself.

No. We couldn't find one on Tesco Mobile's own site, so any address you see on a complaints directory isn't one Tesco Mobile publishes. Tesco Mobile takes complaints through the form on its own site: https://www.tescomobile.com/help/other/making-a-complaint. Write the complaint out before you send it, and keep a dated copy of what you sent: that record is what you need to take it further. NoReply writes that complaint for you free, with the law it relies on cited. If Tesco Mobile hasn't sorted it within 6 weeks, you can escalate free to the Communications Ombudsman (Ombudsman Services).

We haven't found a complaints email address that Tesco Mobile publishes itself, so start from the complaints route on Tesco Mobile's own site: https://www.tescomobile.com/help/other/making-a-complaint. Put "Formal complaint" at the top, with your account or order number, what went wrong, and the outcome you want. Keep a copy of what you send, or a note of the call with the date, so you have a paper trail. If Tesco Mobile hasn't sorted it within 6 weeks, you can escalate free to the Communications Ombudsman (Ombudsman Services).

Tesco Mobile complaints can be escalated to the Communications Ombudsman (Ombudsman Services), free of charge, after 6 weeks or a deadlock letter. Complain to Tesco Mobile directly first: the ombudsman only takes your case once the company has had a chance to fix it, and its decision is binding on Tesco Mobile.

Tesco Mobile has up to 6 weeks to resolve a complaint. If those 6 weeks pass with no fix, or you receive a "deadlock" letter sooner, you can take your case free to the Communications Ombudsman (Ombudsman Services) for a binding decision.

Not for an individual dispute: Ofcom regulates the industry but doesn't resolve personal complaints. Your route is to complain to Tesco Mobile in writing, then escalate to the Communications Ombudsman (Ombudsman Services) for a free, binding decision. You can still report Tesco Mobile to Ofcom to flag systemic problems.