Still not happy with cell c billing

For the he past week i gave been looking for answers with cellc regarding my bill , what’s worse agents ive been talking to are not taking my matter serious , I’ll go back again to where everything began. In may i got a notification from the bank that there was a reversal on my payment , I called cell c to confirm , i was assured by the agent I spoke to that everything seems fine on their side, to my surprise the following month (June) i was billed double the amount (R1400) was taken I called in again but i was told it’s because there was no payment the previous month, the following (July)month the correct amount was taken. Last week I got a notification saying i was in arrears of(772) when I called to inquire i was informed that i was charged a penalty fee, and when the debit went(2028) was debited when I called I requested to speak to the supervisor on the floor the agent gave me a run around and eventually a person called thato said she was the supervisor she gavr me a break down which was a lie saying there have been some few reversals on my account I told her there is no such, I pulled my bank statement i now have full proof I have been billed incorrectly, i can even send through proof, cell c take their customers as a joke