I was sold a lie

I upgraded my contract in August 2017. I had 460 minutes left on my previous contract. I was very specific in that, if they cannot carry over my free minutes, I will not upgrade. I mentioned this 3 times and had confirmation 3 times that it would not be a problem. So I based my decision on this information and low and behold, as soon as my new contract kicked in a few hours later, the minutes were NOT transferred. After 5 calls logged, going back to the MTN Clearwater Mall store, I still have no success. They NOW keep on telling me minutes are NOT transferred. A bit late after I explicitly told MTN and based my decision on this transfer. I paid for those minutes and I feel ******. MTN stole the time I paid for over and over again. I've been with MTN for over 17 years. NOT HAPPY!!!!!