Incorrect billing /misinformation on expired contr

I have complained about this query since the end of November last year and I have file a hello peter report on the 4th of January as well and still I have not received a call or any adequate feedback from telkom mobile whatsoever. I keep getting replies apologising for the delay and telling me that my query is being attended to since last week Monday but I have not received one piece of concrete information or feedback. Telkom mobile is the worst network provider ever and they treat their customers as though they are not even human. I am sick of explaining myself . I just want help and everything to be corrected that's all! There was an incorrect Internet bundle billed on my account which was not requested for as my contract has lapsed. I want to sort this out please.