Contract ended MTN still debiting my bank account

I contacted MTN in December 2015 to notify them that I will not continue or upgrade my contract, and was instructed by one of their agents that I must call back January 2016. <br> <br> I contacted the call centre January 2016 and send them an email saying that I will not be upgrading and continuing with the MTN contract. They have been debiting my bank account until this month. When I contacted the call centre again the agent advised me that the person who answered my call in January 2016 did not process my cancellation and that MTN will refund me my money that they debited. This was 2 weeks ago. I am still waiting for my funds to be refunded.<br> <br> No one came back to me to notify me that my subscription was cancelled and when my funds will be released. They debit your account 1 minute but you have to wait weeks to get your own money back.