Pathetic service Cell C

I have been with Cell C for a very long time and I have never received such a pathetic service! I called your Retention Contact Centre on the 12th December past 10, I have advised that I want to close my contract and asked how much am I suppose to pay and I was advised it is R583.17 and I paid R584. I have been doing follow up since Tuesday as the payment was not yet reflecting, today I called again and your *********** team leader (Jabulile) who can't even apologise to the customer advised me that you will be debiting on my account in January again FOR WHAT???? When I told you Cell C that I want to close the account and how much in total am I suppose to pay. Is this how you are retaining your customers by robbing us? I will be canceling my second contract with you Cell C I am very ANGRY! Can you please resolve this and listen to your calls and get back to me.