can you fix a bent iphone 7?

I have a bent iPhone 7. It’s only recently had problems where it has calling issues. I didn’t even realize it was bent until I took it to the AT&T store because it’s always been in a case. I have it under warranty from square trade, but they make me bring it to the Apple store. I am going today, but wonder if it’s worth fixing or very expensive? I’m thinking of switching carriers and upgrading instead. Has anyone had this issue?