Cell C poor customer service

I last reported poor service we are getting from Cell C, a simple request was made that they should provede me with a detailed stamen from January to OCTOBER ( ITEMISE BILLING). Note that I haven't received that, instead they have emailed the same information being disputed, Again I haven't been using my sim card do rsome months because my sim card was block, but I am getting billed on monthly basis, no feedback, I did received an email from Tebogo Ndlovu who has not yet responded or send the required information. Today I decided to call a. Cancelation services from Cell C, wanted to cancell the contract because of the poor service iam receiving from the Company, the response is, I cannot cancell because my account is in areas, therefore it will remain active until such time my account is in paid in full, how can I pay something that I don't agree. The November statement has the information of numbers that I have called, but according to my knowledge I didn't use my phone last month I feel that the company is using bullying tactics, last month an amount of R 7 581. 89 was debited, I had to do a reversal, which means I have to do reversal on monthly basis