Billed for incorrect account

I cancelled by ADT armed response in October and they immediately confirmed that the service was cancelled. By the end of October another debit order came off and I immediately complained. <br> <br> When the agent looked at the account ref I gave her she said and confirm that it is not me and that they debited the wrong account. She requested a bank statement. When I looked at the statement I could see the was other debit coming off my accounts for ADT aswell and a total of just over R3000.<br> <br> 1) since October till today that debit order is still coming of my account, which is disgusting as I request it to be stopped.<br> <br> 2) Still waiting for a refund for to months.