Bad "service"

I have been battling since April 4th to get Telkom to stop billing me for a service which was cancelled on their own advice. I have spoken to 6 different people at the call centre and every time my problem is "Escalated". Promises made by call centre staff are never kept, even the supervisors who were supposed to call me 3,5 months ago still have not done so. BUT, the accounts keep coming, even though there is no line. Your "service" must be the worst in Africa Telkom. Sies!