Gamestop has some of the worst customer service I have ever experienced at any store.

I would've gone to another one, but there's only 2 gamestops in my area, all other stores that carry games are at least 30 mins away.
The other gamestop is equally as bad, if not, worse

Next time preorder in person, get a receipt, and make sure it says care package edition or whatever so you have proof.

we did preorder it in person, we did have a receipt, but we misplaced it. it is irresponsible on my part, i admit that much, but still, the fact it was changed is ridiculous.