6 Months and still no help!!!!

I signed up with TELKOM in April 2018. When I signed the contract I asked for my account to be capped. When i received my 1st invoice it was more than the agreed amount. They advised me that my account was not capped. I asked again for it to be capped which it is apparently but I am still being billed over R700 more than what I am supposed to pay. My debit order also does not go off on the 1st of every month as it is supposed to. I have called numerous times and no one can tell me why my account is more than it is supposed to be. When asked to speak to a manager there is never one available and request for call back does not happen. I have disputed my billing invoice every month and when I look again it says resolved. Resolved with who? No one even contacted me??? When I spoke to a consultant she said that my account is rolling over every month - NOT TRUE - I paid in full every month!!!!!!! I want to cancel my contract with Telkom as there is no assistance and no one knows what is going on!!!