BAD SERVICE

I have been having issues with Nimble and MTN. I have been receiving calls regarding my account that was handed over to Nimble apparently. However, I have been requesting my statements becaue I have been paying MTN recently and according to Nimble I owe R39000 which is ridiculously incorrect. Though I have been asking for detailed statements so that I can settle my account and clear my name. Till today no one has responded after several emails and follow ups,which clearly shows that there's ***** going on. Hope both Nimble and MTN owners are aware of what is happening to clients. I would like assistance from the relevant people since no one bothers, even MTN legal and call center. Nimble also doesn't care, all they do is send the very statement i told them it is wrong. It is 6 times more than my balance.