Bad customer service / incorrect billing

I have been on the phone with cell c for more than 45 minutes in regards to a query about a contract I had.<br> <br> I have been sent from pillar to post about a claim that I still owe R55.99 which I don't even why I'm told I owe. My contract came to an end (25/12/2015) of which I submitted a cancellation email on the (25/11/2015), last payment was debited today<br> <br> I hope you find this in order and can I get an explanation on this as there was no mention of me paying extra when cancelling. And the fact that there was an increase of R10.00 on my monthly instalment which I didn't sign for...<br> <br> <br> ***<br> <br> I'm contacting Cell C because of an SMS I received about non-payment and states that it has been reported to XDS credit bereau for a collection<br> <br> Money was debited from my account on the 26th of January.<br> <br> I was promised to get an agent to call me on (Monday) already which I'm still waiting till today (Thursday)<br>