I have actually had a few emails now from people who have cancelled their contracts and still been charged by Three. Worse still, they receive threatening calls/emails/letters from the overseas/indian call centres requesting payment.
Other cases include Three customers reaching the end of the contract term and Three call center advisers refusing to issue PAC codes for customers to transfer their numbers to more reliable networks. All of this is absolutely not acceptable!
Wherever possible try and contact the executive office address and I will keep hunting for UK telephone numbers and emails.
I will be looking more into this but please keep emailing me with your cases and if you are in the middle of a complaints procedure, let me know how they are getting on so I can advise other visitors to this site.