Cancelled contract not cancelled

At the end of May I went into MTN Stoneridge to cancel my Broadband Lite data contract that was way past its 2 year term. I actually WATCHED the gentleman assisting me cancel it on the computer, but MTN has not done the cancellation as I have been billed AGAIN for this very same contract that I cancelled - and to add insult to injury, the cost has increased.<br> I want the contract cancelled immediately, and I want my money refunded.<br> <br> Shocking service to a long standing client.