Pathetic service from MTN once again!!!

Never in my life have I been so appalled by service from a cellphone network, I was transferred to MTN from Nashua mobile when they closed down and since then my contract has been a nightmare from Been billed different amounts every month and no real explanation to now doing an upgrade where I get told my contract will be R817 only to get debited R1284 and after 6 days of calling and over 30 min on each call and speaking to about 10 different people I have 10different stories... This is not acceptable I will take this up as theft as I did not sign for this amount until such time as MTN refunds me and ENSURES this does not happen again.<br> I am lost for words as to how *********** a customer service company can be. It's shocking!!!!!! <br> <br> I have all emails and all calls recorded where you can listen to how each person blames the next and your request number system doesn't help as you get told 2 to 24 hours we will call you ....WELL 6 days STILL no call?? Call that service? <br> <br> I expect answers please!!!!!