Account Handover-No response from Head Office

In 2014 I suspended and cancelled the account since I have moved house. I received communication from Jody in the accounts department(ADT-N1 City) in November 2014 stating the account has been cancelled and that the accounts department will be in touch to discuss the penalty for the cancelling the contract early. I received no communication after that.Last week I received a \sms"/message stating my account (ADT accounts) has been handed over to a company called Debtsource. I then called debtsource and got through the third time I spoke to someone whom told me the account was handed over because I have not paid the penalty fee. I stated that payment would not have happened for the penalty fee if no statement was sent to me. She referred me back to ADT"