Account not closed after 10 months

This will now be my 3rd attempt to share my utmost poor service with telkom. After 10 months of over 20 telephone calls and attempts to close an account, telkom still attempts to bill me every month it. Cancelation forms have been send, 20+ phone calls have been made to useless operators who promised me that my case will be handled and feedback will be provided to me my, but with no success. I don't know what to do anymore, because even Hellopeter can't seem to help me. My reference number from telkom is ********** 9. I just don't have the time and energy to explain my situation again...