Extremely poor service

I have 5 contracts with vodacom and have been a loyal customer for many years. I spend on average R3000 per month with them. I went under debt review 4 years ago and I'm currently in my last year. I have always paid my cell contract every month without fail. I have done various upgrades while under debt review however this time they now have a problem because I'm under debt review. Why before and not now ? Spend R3000 per month and never missed a payment ? I wanted to upgrade to a I phone 13 which I approx R640 per month on the contract I saw but they say I don't qualify because of bad credit rating ????? If I go online I can upgrade to other contracts with other handsets to the value or R877 per month , more than the contract that I actually want with the I phone 13 which is approx R640 per month. They are simply bot prepared to help me. It's really sad when you have been such a loyal customer who spends alot of money with them every month. I think it's time to start canceling my contracts!!!