still paying a cancelled contract!!!!

In December I emailed MTN and told them that I wanted to cancel my contract as I do not live in South Africa anymore. I then received an email stating that my contract would be cancelled and that my South African number would be put on a pay as you go, as my contract was ending at this time anyway. For the month of January and this month of February my account in south Africa has been debited against my will. If I am told that my contract will be cancelled I expect that my bank account would not be debited especially because my bank account is Now not being used and I am now in debt in south Africa!!!!! I expect to have that money put back into my account or I will file charges of theft with the police. MTN you are *****ing my money and taking advantage of me, this also goes against the consumer protection act 2008.