cancellation of service - still receiving bills

Hi, I contacted Telkom on the 11/10/2017 and requested that my service be cancelled as I moved house and didn't require the service anymore. I followed up later in the month to check if all was on track, only to find out that they did not receive the instruction. I resent the cancellation form to the cancellation department and have done so on a number of occasions since then and still nothing. I just feel that Telkoms service is so pathetic and there is just no help anymore from anyone. I need urgent assistance to resolve this issue.