Telkom taking double and Donald cannot be reached

At the end of July 2017, Telkom charged me R641 for a monthly contract that I should be paying R199. I have been quering this through Donald Motau who called me to chase down this R641 (very rudely). I have also queried this through Telkom online (they closed my requests without my consent or knowledge), through the Telkom shop in Bayside (rude lady who couldnt help at all and had an attitude).

Another R641 was deducted two days later and I called Donald Motau on 011 ********** and he said he would get back to me - he did not and I had to call and email him. His last response on 4 August was: Apologies for not coming back to you early, as I have indicated, there is a problem that is being investigated and it has been escalated as it involves a few accounts with the same problem. Will provide interim updates on this matter. Kind regards Donald Motau (ID) (011) **********

Since then I have had no response, his emails are now bouncing and his phone goes unanswered. I want an answer for such bad service from Telkom. You are useless and this is not the first time as I have been overcharged countless times even though there is a cap on this contract.