Incorrect billing

Hi my name is Phomello<br> <br> last year November I upgraded my contract to the Iphone 6S Plus 64GB which I am supposed to be paying R729 plus insurance which is R120, but to my surprise I am being billed R1031.00 for the contract for the past 3 month.. Which this is not what I signed up for I feel like I was miss led when upgrading my contract. I am spending more money then ever with this contract. My data runs out way to quickly and have to top up my data often also this network issues are are really affecting my business as I people I work with cannot get a hold of me most of the time and I find that the new contracts MTN has done are really inconveniencing with the Minutes that are given. <br> <br> Please note that I want this contract cancelled and I will NOT!!! be liable for any termination charges as this is ridiculous to keep complaining and nothing is being done regarding my issues.