Thanx for the quick reply Neil
Unfortunately, I didn't take down the name of my Salesperson or the House Moves Advisor/Supervisor I spoke to. Hopefully if they are going to be consistent with their policies (or rather horror stories), then I will probably receive the same in writing in response to my letter.
Would you happen to know how long NTL take to respond to complaint/cancellation letters? I'm thinking of cancelling my direct-debit as soon as they have taken payment for the next month (which is my 30-day notice period). I don't fancy doing any chasing up afterwards so I'd much rather let them do all of that once I've served my 30-day notice period (if the situation is not settled by then that is).