ACCOUNTS DEPARTMENT USELESS

By reading ALL the previous shocking reviews, I now understand why I am having to try and resolve my issue on this medium. I took out a MONTHLY CONTRACT, I REPEAT A MONTHLY CONTRACT. I had my own router, supersonic had previously done the fibre connection to this apartment as they are the allocated service provider.All that was required was an activation. 10 months of use and we have now recently cancelled as we no longer required the service and we to have been billed with a clawback invoice (which by the way I have never actually received). I too have phoned the call centre 7 times , I have sent 5 emails to their accounts department which have never been responded to. I was even advised by one of the call centre agents that despite them raising a query on my account with the accounts department, the chances are that they would not bother to come back to me. I have since reversed the debit order and will continue to do so up until such time that this is sorted out. CAN SOMEONE PLEASE ATTEND TO THIS QUERY AND ADVISE. THIS LEVEL OF SERVICE IS DISGUSTING AND SHOULD NOT BE TOLERATED. MTN THIS IS YOUR BABY AND YOUR MANAGEMENT IS BEYOND PATHETIC!!!!!!!!!!