ADT unfair practises

I have cancelled with ADT as I do not have a contract with them and gave them notice more than a month ago. I have send serveral emails to ask them to make sure the debit order has been stop. But people warned me they wont stop the debit orders because this is the way ADT operates. I am no client of yours but still you deduct the debit order plus licence fee. It is ***** and if any body else do debit orders with out the bank account holders permission its *****. I was considering to get ADT again in my new home but now that I know you are capable of this practice I dont think so.O yes, I had to beg ADT to remove their alarm system wich I rented.