SHOCKING SERVICE FROM TELKOM - INCORRECT BILLING

I have had a problem with my Telkom account since last month. Telkom is charging me for two fibre lines when i only have one. I have made numerous calls to the call centre and each person that i speak to logs a dispute but never resolves the problem. I then asked for a manager of the department to call me which was to weeks ago and still no joy. I went in to the Telkom store on Sunday at Clearwater branch and the lady logged a dispute because she also agrees that they cannot charge me for two lines. I received my new bill now and it is still incorrect. They are still charging me for 2 lines. THE SERVICE FROM TELKOM IS RIDICULOUS. TOO QUICK TO TAKE THE MONEY BUT CANNOT RESOLVE THE PROBLEM