Refusal to Cancel Data Contract since April 2015

I have a Telkom month to month contract for data, which has served me quite well but a new development in the beginning of the year has made is unnecessary for me to continue with this contract.<br> <br> As this was no longer necessary in April 2015 i went to the Centurion Mall branch where opened the contract and asked them to cancel it, I explained this is not my primary number (as it was used for data) and they would need to call me on a different number I provided if they need to get a hold of me. I went back in May as the amount was still being deducted to find out my request has been cancelled be because they could not get a hold of me. <br> <br> In June i saw it was still being deducted from my account and phoned the call center and spoke to the agent and again the request has been closed. The next moth was a similar story but i waited 30 to speak to the team lead and asked them for assistance and she assured me they will sort it out and asked me to email her which i did and that was the last i herd from her. And again this month i saw it has still not been cancelled.<br> <br> This is a major financial burden that is affecting me previously over a very simple over sight.