Upgrade of contract!

After many years with Vodacom I am disappointed in their services! I am due for an upgrade on my contract, I upgraded online and received an email that my device is on its way. I upgraded to the P30 with a P20 combo deal. More than 24hrs later I get a call from their upgrade department telling me that (1st) the HUAWEI P20 is discontinued, (2nd) the HUAWEI P20 lite is discontinued (3rd) now the P30 is also discontinued?!?!?! The consultant gave me a call back telling me that he can help me with my upgrade as they do have stock now but I will pay extra as they do not have the phone in black but in blue. Now my question is, what does the color of the phone have to do with the original upgrade price?????? I feel like canceling my contract and moving to a provider!!