Vodacom upgrade

have a customer with Vodacom for about 20 years now. I have never had any problems or issues with Vodacom in the entire 20 years being a faithful client. I would like to state my problem as below. Due to current state of affairs in life, I was forced to undergo a debt review process. I currently have a number with Vodacom that can be upgraded.

I pay a total of about R520 a month with an iPhone 12 device. This package was taken out in 2022. The upgrade according to Vodacom was 2025-04-01. I then saw an advertised deal on the Vodacom website for an iPhone 13 priced at R499 per month X36 months. I was interested in this deal. I have placed under Debt Review since 2023 and fully understand the fact that I can take out any new contracts which makes sense to me. I am dissatisfied because Vodacom refuses to upgrade me to the R499 per month package stating that I cannot get this deal because I am under debt review. Which I totally do not understand seeing that one of my other numbers upgraded during 2024 and 2023 while I was under debt review. How is this possible? In fact, the deal I want now is even cheaper than what I am currently paying. Which will make more sense financially. However Vodacom is willing to process my upgrade for the same iPhone 13 at R820 a month because this is what there system is offering with me being under debt review. How can they offer me the exact same phone for more expensive and not the cheaper package at R499? This does not make sense at all. According to my research doing an upgrade is NOT a credit agreement but in fact a service agreement. With this said, the contract between Vodacom and I, are already in place. As long as the upgrade costs DO NOT exceed the current amount I am paying. So why can Vodacom gladly give me my upgrade at R820 a month and not at the cheaper R499, which is currently cheaper than what I am currently paying? I find this very unfair and I would like to be assistance and do my upgrade for the cheaper amount please. I have been a loyal client and expect Vodacom to assist me in this need.