pathetic service and no customer service

I cancelled my subscription in November. I cancelled the contact centre and was assured a debit order will be processed against my account as i cancelled before the deadline.<br> Well in December a debit was processed, which my bank reversed.<br> Today i received a sms stating i owed money. I called the accounts department and the agent was rude, she after a while didn't even respond to my questions, she remained silent on the call when i asked for the telephone recording that stated that i won't be debited and no funds were owed. I have never been disrespected by a company like this before, i am so glad i am no longer with ADT. Their agents are the rudest people i have ever come across<br>