Incorrect Billing due to Incorrect Contract

I signed up for an Smart Home Essential LTE, R429 Per month. The lady that assisted me somehow made a mistake which she realized and assured me that it will be fixed. This was never done and as a result I have been charged added amounts not belonging to me. I have been to the branch 5 times afterward to try and rectify the problem and 2-3 disputes were lodged. I called the customer services they referred me back to the branch. Eventually the lady that opened the contract called me to apologize and says she will see this through. However its been 6months and I still sit with the same problem. I dealt with 4 consultants and no joy. Now my line is closed and I am paying for something unfairly. Telkom will be heard of on all social media, newspapers and the director of the company including shareholders. I want them involved. Please be advised Telkom, you not aware of the Consumer Protection Act, you think you can just neglect consumers and we must tolerate your abuse. I have my facts so does the sales consultants.