Unable to Upgrade

I have had my contract with Vodacom for over 10 years. Have been under debt review from 2012 and have been able to upgrade from them. Now I was told this is not possible because of my debt review status. I feel there was no investigation made into how I have managed my payments which if I may say I have not missed one payment in the last 8 years since I have been on debt review. What boggles my mind is that the current upgrade will be cheaper than what I have been paying for the last 2 years. I feel this is discriminatingly appalling as my history as a client was not take into full consideration. Only left now to do is end our relationship.