I AM DONE WITH MTN!

I have honestly had it with the MTN call centre. They are the definition of useless. I called for 2 weeks trying to get my contract switched to prepaid as my contract ended in July. Someone finally assisted me on the 21 Aug and I was under the impression that my contract would be cancelled and switched. I call today and nothing has been done all the call centre is good for is putting you through!! They have no sense of urgency. If I am charged for the month to month again this month I am going to really lose my cool!!! I need this sorted like last month already!!!!!