Worst Customer Service Ever

For many years I had a contract phone with MTN which was going off on debit order. In August last year I sent an email requesting the cancellation of the contract and changing to Prepaid. I received a confirmation that September would be my final month and the last debit order would be October 2015. However, this was not correct they continued with debit orders for November and December and it has just been impossible to get my refund of R1 778. The customer care emails say they forwarded it to the relevant department and further I have hear nothing. I tried to phone but you phone the *** and you are told that it is a prepaid number, so I phone that number and the \friendly consultant\" after explaining my whole story, tell you they need to put you through to contracts which goes to the *** number and of course that again tell you is it not a valid contract phone prepaid. I am getting absolutely nowhere but I am sure if I was in arrears with payments I would know all about it."