upgrade and incorrect billing

PLEASE DON'T UPGRADE YOUR MTN PHONES !!! I have upgraded in June 2015 this year. Patrick at the Grove, Lynnwood, Pretoria had to contact the helpline for assistance in order to complete the applicant's upgrade. Contract was for an amount of R479 p.m. Sept 2015 an amount of R14868.91 was deducted from my bank account. Which was reversed. Only paid contract amount of R479. After several visits to The Gove and phone calls trying to resolve the matter. The Grove blames MTN h/o. My phone was suspended on 30 Nov 2015. I travelled to MTN head office explaining my problem. I was promised by various staff members that the problem will be solved. To date I still have no one returning my calls as promised nor have pleasure of a cell phone due to suspension. Craig *** and Taryn *** both did not keep their promise to resolve my problem.