Terrible Customer Service and billing

I signed a data contract during December with MTN. It was one of the promotional packages whereby you get double the data. I had problems from the start. First of all the sim card was RECA barred. I made many calls to MTN and eventually after more than a week I could start using the data. The MTN store Rietfontein was not helpful at all and I had to sort the problem out by myself. They also provided me with socking advise. After that and still to this day I have been billed ridiculous amounts. I have made many calls to 808 and have many reference numbers. Every time I call I am told that the discounts need to be loaded and that I will be done this time. To this day my issue has not been resolved. My ticket was escalated to a manager by the name of Craig two weeks ago and I have not had any feedback. I have been more than patient but my patience have run out. MTN will not get any more business from me in the future.