Vodacom online upgrade

I did an online upgrade on the 4th of March for a Samsung A31. I received an email to say that my device will be delivered. On the 11th of March I decided to phone and find out when I can expect delivery. I was then informed that this device is discontinued, the agent then tried to do a new upgrade for me, also for the Samsung A31, but just another colour, after we went through the whole process, he told me that this device is also now discontinued. If I however go online to do an upgrade these devices still show up as available. I am quite disgusted with Vodacom at this stage and considering canceling my contract after many years with Vodacom