Charged for Data after cancellation of contract

I am now really getting to the end of my tether with Telkom's pathetic service. <br> <br> During August 2015 I enquired as to when my cell phone contract on my cell phone was about to expire. I was told that it expires on 1st November 2015. I immediately filled in the cancellation form and e-mailed it to Telkom on 4th September 2015 to request that the contract be cancelled.<br> <br> The very first response I got on this e-mail was on 14th October when they tried to call me. I e-mailed them and indicated that I wanted the contract to be cancelled because I do not need it any longer. Their response was as follows: \Kindly take note that I have post dated for the number to be canceled on the 12/22/2015 as its ending that day ."<br> <br> I presumed that I was originally given an incorrect expiry date and that the contract only expires on 22nd December 2015. I accepted this and thought that everything was now in hand and that the contract will simply expire on 22nd December.<br> <br> However"