Vodacom Upgrade

Vodacom will never miss an opportunity to ***** you over. I am due for an upgrade on the 16th of December and now am being told that wont happen. I have never missed a single payment on the contract and yet somehow my profile with Vodacom doesnt qualify for an upgrade. Why was i not informed tgat there is a possibility that when am due for an upgrade it could be declined for whatever reason Vodacom sees fit. If i had this information i would have not taken up the contract. This is the second time Vodacom has *****ed me over you guys just dont care about your customers all you want is our money.