Bad service delivery from Cell C GetMore

I have requested for the GetMore service to be cancelled since July this year and each time that I call Cell C to cancel it they redirect me to GetMore because they say that they cannot cancel it on their side. I have been directly on the phone with GetMore and each time they confirm with me that the service has been cancelled. However, I am still being billed R51.75 every month by Cell C. Last month I called Cell C customer care and spoke to a consultant who gave me the following case number ********** 22. I demanded that I be refunded the monies that I have been billed for since July. I am not an aggressive person but I am really frustrated as they are *****ing R52 from me every month for services that I am not using and have previously requested to be cancelled. I don't where else to turn now. I have been billed again this month and they haven't even refunded me yet!