cancelled adsl and data bundle

I canceled my data plan in Feb 2015 and moved service providers. I was still billed by Telkom for two months following the cancelation and ultimity my services was suspended. Went to Kenilworth centre in april to query the account and found out that my cancelation for data plan only was only done in march by Telkom. In order to reconnect my service I was forced to pay R900 and a dispute was logged. I then last week i received a SMS notifying me that my account is once again in arrears by R850? Having been with Telkom for the months before changing service providers my account was never over R500. And once again it is stated if account is not paid my services will be disconnected. This is a huge inconvenience as I work from home. I should only be paying a telephone bill with Telkom which is never more than R50! I am now paying new service provider and Telkom demanding payment! Bearing in mind that cancelations was done in Feb and I'm still being billed by Telkom!! Please investigate as I'm not prepared to pay for lousy service and have my service being disconnected time and again! Calling the Telkom customer care is futile as I waited 30mins and still no agent had taken my call!