Refuse to cancel contract

I cancelled my contract Oct 22 but Tracker keep on debiting my old account. I sent them all the info they required and even confrimed telephonically that they have all they need and will cancel. Till today they keep on trying to ***** me for more money by not cancelling the said account. This is definitely a **** which is obviously supported my their "management". Now i am being treatened by their legal guys. Stay away from this company! This is far worse than just bad service. Someone should look into this kind of practice where they refuse/delay the termination of a service/contract by making it as difficult as possible to do so and to communicate with them by mail e.g. "NO RESPONCE" e-mails. Useless to phone them ayway, promises but no action taken. Never again!!!!