← All providers · Last checked 2 November 2026
Cuckoo: how to complain, price rises and leaving
A plain-English guide to complaining to Cuckoo, its price rises, how to leave and where to go if it doesn't put things right.
Bill Fighter is independent. We are not affiliated with, endorsed by or paid by Cuckoo or any other provider. Names are used only to identify the company.
How to complain to Cuckoo
Start with Cuckoo's customer services, then make a formal complaint if it isn't sorted. Cuckoo's complaints process is set out in Cuckoo: Complaints code. Keep a note of the date you complained and any reference number.
Ofcom says every provider's complaints code must include a phone number, a UK postal address and an email address or web form for complaints.
Cuckoo price rises
Check your contract. We haven't confirmed Cuckoo's current price-rise terms on its own website, so we don't show a figure. Your contract summary sets out any annual rise.
Ofcom's rules mean price rises in contracts taken out from 17 January 2025 must be set out in pounds and pence. If a rise wasn't set out in your contract, or is bigger than it allowed, Ofcom says the provider must give at least 30 days' notice and let you leave within 30 days without exit fees.
Cancelling or leaving Cuckoo
- If your minimum term has ended, you can usually leave by giving the notice your contract requires. If you're still in contract, early exit charges may apply, so check first.
- Broadband: Ofcom explains how switching works, including when the new provider arranges the switch for you.
- Near the end of your contract, Cuckoo must send you an end-of-contract notice with your current and future price and its best deals.
If Cuckoo doesn't sort it out
Cuckoo's own complaints information lists it as a member of CISAS, one of the two free alternative dispute resolution (ADR) schemes for phone and broadband. You can go to it once at least six weeks have passed since you first complained, or sooner with a deadlock letter, and within 12 months of a deadlock letter. (For complaints made before 8 April 2026 the wait was eight weeks.)
Free letters
- Broadband: price rise letter
- Broadband: out of contract letter
- Broadband: poor service letter
- Broadband: billing error letter
- Broadband: cancel or leave letter
Add Cuckoo as the provider and your details fill in the letter for you.
Guides
- Mid-contract price rises: can I leave?
- Ofcom end-of-contract notifications
- How to haggle your renewal
- Price-rise calendar and free alerts
Quick answers
How do I complain to Cuckoo?
Contact Cuckoo and make a formal complaint using its complaints code (linked on this page). Ofcom says every phone and broadband provider's complaints code must include a phone number, a UK postal address and an email address or web form.
Which ombudsman covers Cuckoo?
Cuckoo's own complaints information lists it as a member of CISAS. It's free to use.
When can I take a Cuckoo complaint to CISAS?
Ofcom says you can go to the ADR scheme once at least six weeks have passed since you first complained, or sooner if you get a deadlock letter, and within 12 months of a deadlock letter. CEDR says complaints made before 8 April 2026 needed eight weeks.
Can I leave Cuckoo if my price goes up?
If the rise was set out in your contract in pounds and pence, you generally can't leave penalty-free because of it. If it wasn't, or it's bigger than your contract allowed, Ofcom says the provider must give you at least 30 days' notice and let you leave within 30 days without exit fees.
Sources
- Cuckoo: Complaints code
- Ofcom: making a complaint and using ADR schemes (updated 6 August 2026)
- CEDR (CISAS): help and guides – 6-week rule and complaints made before 8 April 2026
- Ofcom: Telecoms price rises – what are your rights?
- Ofcom: switching broadband provider
- Ofcom: companies must tell customers about their best deals
Last checked 2 November 2026. Policies change, so check the linked pages and your own contract before you act. General information, not legal or financial advice.