Theft

So I am tired of trying to have my account at Telkom sorted out. It's been incorrect since June this year and it doesn't matter what I do nothing changes. Month after month I keep getting charged DOUBLE for my telephone line... it's insane. Telkom can never help me and my best was Narriman Lalla telling me it would sort itself out at the end of the month, I stupidly believed her. What do I do now. It' s not right, it's probably even theft - overcharging me every month. What do I do next to get this sorted out... the CPA? Short of actually suing Telkom, which I certainly do not have the time, energy or money to do. I'm at my wits end! It's scary, but to think that Telkom is possibly worse than the CoJ!