mtn contract cancellation

I cancelled my MTN contract on the 3rd of December ***8205 and the contract was not cancelled, however in January 2016 the contract was not cancelled because when I saw a debit order that was taken in January I thought that was a last debit but to my surprise in February 2016 another debit was taken which I then called and I was advised by an agent Thato that the contract was not cancelled *** but said she will send another request to cancel and the money taken to be refunded but nothing happened then I sent an email to the cancellation dept *** which the email rep**** that they will get back to me in 48 hrs but nothing happened then again in march 2016 another debit order went through which I then reversed which is not good for my itc credit scoring but I guess MTN doesn't care, all I want is for my money to be refunded back to my account as I still have 1 contract left which will end in September and I will never renew or take another contract with them cause they just don't care.