Help with trade in issue

Just needed some insight in this. I brought my iPhone 13 phone for trade-in and also placed the order to pick up an iPhone 16 Max + the Ultimate Unlimited plan, which would get me the full $830 trade in credit. When I went in, they did not activate my phone but they did take the trade in. Later on, I find out that only got $165 for it because the plan I had was not eligible for the $830 (which of course, because the new phone was not yet activated so I was still on the crumby $35 plan, not the $55 one that was eligible for the trade in credit)… so it’s been about 1-2 weeks and there’s no change in the trade in credit although I am on the correct plan, which is the most expensive one. Wondering if anyone had any insight on this? I only went on the expensive plan to get the full trade in credit and because of we order we went in (trading in the phone before activating and upgrading service) my trade in credit was decreased. Does anyone have any advice on this?