Okay, so I am suppose to get $830 discount on the iPhone 15 Pro max. It shows that I am getting $26.88 off my bill for 24 months, but then at the bottom right it shows $23.12 monthly. Does that mean I won't have to pay anything?

I know the difference from the iphone to $830 is give or take $200 bucks, but I am confused as to what this website is trying to show me.

Is there any way I can just pay off the remainer after the $830 credit?

My goal is to take my samsung galaxy phone and upgrade to a iphone 15 pro max and pay the remaining amount so the monthly bill doesn't go up. (multiple people pay for it, its just easier to get it over with then get it placed on the bill every month).

Can anyone help me with this? What can I do?

Trade in to Apple with Go 5G Plus (Go 5G Next not included)

Trade in to T-Mobile with Go 5G Plus or Go 5G Next

Trade in to Apple with Magenta Max, Magenta Plus or One Plus (not shown on Apple’s site but acknowledged by T-Mobile)

Trade in to T-Mobile with Magenta Max, Magenta Plus or One Plus

Trade in to Apple with Go 5G, Magenta or One (Apple’s site displays Magenta Max, Magenta Plus and One Plus in this tier incorrectly, see above)

Trade in to T-Mobile with Go 5G, Magenta or One

Trade in to Apple on other plans (Simple Choice/Essentials? Not showing on Apple’s site)

Trade in to T-Mobile on other plans (Simple Choice/Essentials?)

I traded in an iPhone 12 in perfect condition for an iPhone 15 Pro on the Go5GPlus plan with the intention to get $185 in instant credit and $615 in bill credits over 24 months.

I just checked my orders in Apple and it is saying that the device is not eligible due to 13 imperfections?? and the revised instant trade in credit is $0, and tmobile bill credits is also $0.

Unfortunately I do not have any picture of the phone before sending it in, what should I do here?
It was also initiated on 6/3, and it's been more than a month now, and I believe the Apple return policy is 14 days.