MTN makes it impossible to cancel contract!!

I called MTN to cancel my contract on the 13th of October 2015 (***) and was told it will be cancelled on 29 November 2015. I thought that was it, and thought that was quite easy. I was so so wrong. I thought that my final bill will be for November, only to be CHARGED AGAIN...!! After calling MTN again they told me my contract was NOT cancelled and that the call on the 13th Oct was just to NOTIFY them of cancellation and that I still needed to actually cancel my contract!?! All the while being wrongfully charged R300 every time they don't cancel!?! Then I called again on 1 December 2015 (***) and was told the contract will be cancelled on the 14th... (that's today) only to ONCE AGAIN receive airtime I DIDN'T WANT!! And after calling AGAIN today(***) I was told the flipping contract was STILL NOT CANCELLED!!! Now these MTN ******* are going to ***** yet another R300 wrongfully!! Absolutely furious and I have had NO RESPONSE from them. This has been the most expensive and worst experience of my ENTIRE LIFE!! MTN are ******* and pirates *****ing money from people and offer NO HELP to get just cancel and get rid of them!! Urgggh! SOMEONE HELP ME PLEASE!!