i had the same problem they charged me for two bundled mobiles which i didnt own and told me they couldnt de active and the money would keep coming out of my account. they took £80 from me over a period of 4 months and after £120 of calls to their rubbish customer suppert and getting nowhere i decided to cancell my direct debit as i had heard about them gleaning extra payments from accounts that were closed.
If i stole money from talk talk i would be in jail, how can they get away with it the other way round? anyway i refused to pay the subsequent bills as they actually owed me more money than i owed them. they registered a default and have now affect my credit status.
my advice to everyone is AVOID talk talk like the plague, the agressive marketing is a hint as how they conduct their business and nothing surprises me to their unscrupulous behavior.