Loose game cartridges inside of a sealed 3DS case

[yellowgameboycolor | 22]

Hey guys so I just got a game in the mail that was brand spanking new and sealed...but the cartridge was loose inside. I've talked to the seller about getting a refund/replacement, but seeing as how it was their only copy listed, I doubt that's gonna happen. Probably gonna have to return the game unless someone has a good method for trying to get the cartridges back in place. I feel like this would be infinitely harder vs a loose disc game in a sealed case where I've actually had these issues with sealed PS4 games and gotten them back in place properly. Just figured I would try to ask before I sent this off as a return.