CANCELLATION NOT PROCESSED; DEBIT ORDER NOT STOPPED FOR TWO YEARS.

We cancelled our Telkom lines on 9 October 2017; but since then the debit order has been going off our account. We have gone into Telkom stores, we have phoned them muliple times, and emailed them continuously. We do not get any feedback at all and the matter has not been resolved. We do not know what to do anymore.