Vodacom - Contract Migration to Upgrade

I app**** for a mobile phone contract last year (a few months ago) which was approved however there was no stock of an iPhone 15 and I was told to wait. This application was processed at Vodacom Umhlanga Zenith Drive. I made several attempts to contact and to get assistance however no luck. I have a Vodacom SIM only Data contract which i have not been able to use for months now as I have no phone. Managed to get through to them today and asked if I could please migrate my Sim contract to a phone contract for S24 @ R899pm so that I can get a phone, to which I am told that a conversation needs to be had with senior management to see if this can be done. I'm contracted for Data only so don't see why upgrading would be a problem, especially when a contract with higher monthly premiums has already been approved months ago. Please assist Vodacom.