Use Macbook Trade in funds to pay for new MacBook purchase
So, I traded my old Intel MacBook with the intention to purchase a new M1 MacBook Pro. The Apple store person told me that yes, I could use the money that I got for the old MacBook to pay for the new MacBook. He said that they can only put the money into an Apple Gift Card, but said that I could transfer the money to my Apple ID and use it to pay for the new one.
Here's the thing, I think he meant to say to make a purchase from the Apple store, not to pay for it. The distinction is the following: I can't find a way to actually use my Apple ID balance ($1200 from the trade in) to actually pay for the new MacBook. I use the Apple Card, and there doesn't seem to be any way to actually use this balance to pay for a past purchase. Again, I was told (perhaps incorrectly) that I could do this, but the Apple Card does not give me any option to choose anything other than a bank account to pay this bill.
I know have $1200 that I planned to spend seemingly stuck in my Apple ID with no way to use it for its intended purpose (I spent more on upgraded specs thinking that it would be offset by this amount).
I've gone back to the Apple store, and they told me to contact Apple Support. I have contacted them, Goldman Sachs, and their support chat (AI robot which is useless). Please help.