Incorrect Billing/Data Allocation/Cancellation

I was charged packet switch data (R800 worth),when I had 1.42GB of data available to me. I did not get my 5GB data allocation as per contractual agreement on the 1st of the month(Oct). I cancelled the contract on 20 Oct and still no data was provisioned. Even after cancelling the contract, it is still active and I'm pretty sure im going to be billed for it. I have called *** 62 times excl from my mobile and logged 18 calls with no feedback, proof of the usage, provisioning of my data, reversal of data and charges or cancellation. I still have a cellphone contract which I dont plan on keeping when it ends. 11 years with MTN and now this ! I have read many posts (amongst the 19937 records)on hello peter and it seems that this is common practice with MTN, strangely nothing is being done. I am giving MTN the last opportunity to rectify this, I would like the packet switch data reversed, the reversal of the unallocated data along with its charges and the contract terminated immediately with no further charges as the 24 months are up. I have honoured my end of the contract but MTN hasn't honoured theirs. Last chance MTN, do what is right ...