Cell C Charge me a month to month contract

Dear Hello Peter As per my previous complain Daniele Abrahams have contacted me somebody have used my 2 gig internet for more than a year she accused me of doing it myself but I have not. I am working leaving 6.30 and return 17h30 at night. The 24 months contract came to an end and I have cancelled it in December. 2014 Cell C is charging me a month to month contract of R298.00 per month I have not authorized this they do not understand now I get threatened that I will be black listed my invoice is R785.00 for Feb and the Debit order is R1084. Hello Peter I want them to send me proof of this charges given by me I need to sort this out <br> Cell C is *****ing from me I did not give authorization for this debit order to go through I have had it with them.<br> <br> Regards,