Contract expired

More than 3 months ago, i went into MTN flamwood klerksdorp and requested that my contract which expired in may, should be canceled. I do not wish to continue on contract and be transfered to pay as you go. The contract is registered under my company name , i did submit the nessesary paperwork. I also phoned MTN directly and emailed the nessesary forms. I am still waiting any response its has been 3 months and still the debit order runs on my account. I have been back to MTN flamwood numerous times, they can't seem to help me. Their response is they are busy with it. I am not sure whether they are to lazy to do their jobs or are ***********. I am truly appalled by the horrible service i have received from your store. I also want a refund for the 3 months that the debit order has been running.