Another order cancelled out of the blue

I placed an order last week for the iPhone 14 Pro Max 128GB and it went through and had me upload my ID so I did. It sat there pending shipment date with no issues. A couple of days ago I canceled it because it was the wrong storage, it was 256GB, so higher. I went in later that day after it reset my upgrade and put in the order for the right storage. Within 30mins it was canceled. Nothing was sent to me about uploading my ID or anything like the first time. I tried a couple more times and it canceled within a couple of minutes. How could this company send me the link to verify the first time but can't get its system to do it another time??? I tried to do in through a rep and they could not offer me the right payment offer they had to have the tax paid upfront, and online it went towards the bill. They also kept telling me I couldn't do a trade-in because my phone was not paid up but it was paid up, 18 total payments, 50% of the balance of the phone. I would not have been able to process an upgrade myself if there was such a problem. So now I am stuck again at no preorder and being told to go into the store. I am not about to do that as I have to drive 30mins or more to the nearest store. Looks like the only way to get another phone is to switch carriers. This company apparently could care less anymore about customers. The entire customer service team is horrible, rude, and do not know how wireless or the business process works.