Fix my contract upgrade NOW

I upgraded my contract I think on the 23rd February, the MTN Consultant put in the upgrade for the incorrect package. They sent me the S24 with the correct watch but I requested the S24+ with the watch 6 47mm. I was told to take the phone and watch the V&A store and they returned it to the warehouse, they provided me with the IMRS numbers and I gave since been trying to get the contract upgrade reversed so that they can process the correct upgrade which I actually requested in the 1st place. The service from the MTN Business call centre has been pathetic and no one has helped me thus far sending me from one place to the other. I provided the one agent with the IMRS numbers but then he said it's not that he doesn't trust me but he needs the person at the store to confirm that I actually did drop off the phone and watch, pathetic especially since I gave the ref numbers. I went back to the store on the 2nd March and they sent another email to the cancelation team but have not heard anything back. I called the MTN business call center again today and they are still wasting my time. The ref I got from the store on Saturday is: f1f8c7cb-9190-4c3b-887b-c455b0bc9cc9