Incorrect billing invoice/suspended account while I paid

Telkom is the worst service ever. It’s been two months with them but I am already fed up. They debited my account but my sim is still suspended. Please advise, how does one get to cancel your contract? I send emails and only for you to get back to me after days only for you to tell me that you were experiencing load shedding I spoke to Peter M Ledwaba and he said everything was sorted but this month I am experiencing the same problem again