Lack of Product Knowledge and unprofessional servi

In November 2014 I went into the Cell C store in Zevenwaght and spoke to Jean-lee a consultant. I asked him a simple favour just to cancel my contract reason being because I'm jobless since September 2014, but here's the thing I took out a year contract from the 6th of June 2013 till the 6th of June 2014. I made regular eft payments every month from June to June. But what I don't understand is that they never cancelled the contract after June since then they still deducted funds from my account up to September 2014 even though the contract ended in June. I went into the shop that was in September 2014, and I explained and asked them to cancel my contract because since I'm not working I wont be able to afford it but I would like my contract as a prepaid contract because I still want to use it, meaning if I do have money I can always buy me data for my Wifi. When I explained this to the consultant he arranged to cancel the contract to change it to the prepaid contract. As time went on I saw by the 5th of Jan 2015 that my contract is in arrears which means it was still active. I called in to cellc,spoke to managers explained everything but still today there's no answers.pathethic.