Mtn Sky. Changes billing mid contract.

I was sold the MTN Sky package with my own handset for R1400 a month. I was advised that I could message and call and go onto the Internet as much as I wanted to uncapped.<br> <br> I received my first two month bill at R1400 and R1400 and s few odd rand. Now my bills range from R1650 to R1900.<br> <br> I have made at least 8 calls to 808 and am told many varying stories from I am not receiving my full discount any longer to I used 200, Mtn directory enquirers and international calls. My 'extras' come to R50 or less so I am in need of an explanation as to why I am being billed something other than what I agreed to.<br> <br> Today I was told that my subscription has gone up? <br> Really? Mid contract you can just change the amount. <br> I spend close to R20000 a year with MTN and over 40 years that amounts to R800 000. That's just the phone.<br> <br> Mtn should really give you what they promise. I suppose I didn't read the small print? That doesn't make it right. You advertise something, agree to it and then you move the goal posts. Not nice at all.<br> <br> I want a refund for the amounts that you have deducted starting April 2015.<br> <br> I have been passed around your call center and have had no luck solving this problem.<br> <br> Sincerely