http://www.bbc.co.uk/watchdog/advice/internet.shtml
"If youââ‚Âà ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢ve noticed a premium rate telephone number on your phone bill relating to an internet call you didnââ‚ ¬Ã‹Å“t make, you should contact the premium rate regulator ICSTIS by:
Phone †“ 0800 500212
Email †“
helpline@ICSTIS.org.uk
Website †“
www.icstis.org.uk
If ICSTIS feel it is a complaint they can investigate, they will issue you with a reference number.
You should then go back to your phone network (i.e BT. Telewest) and explain the problem. You should explain that you have a reference number from ICSTIS who are investigating and you should ask them if they would be able to freeze the part of your bill that is in dispute while this investigation is ongoing. ICSTIS cannot insist that your phone network does this. You should pay the remainder of the bill that you owe to the phone company
"