Still being billed AFTER cancellation

Did a credit check today and see despite having cancelled my account with cell c in November last year I was still being billed this whole time.

Worse is with no statement or invoice provided, but there in the credit check Dec, Jan... red mark against cell c (against a CLOSED account).

What is even worse is when you cannot even contact cell c to rectify, as when you call: * You are asked to enter the number your query related too * You enter the number and are told "this is not a cell c number" * Of course it isn't because I ported out of your circus and cancelled my account months ago