All he kept saying was it's the rules and he don't have to justify them. (It was one of the most ridicules conversations I had in a long time) Finally realized there was no talking to him so I stood in front of him called American Express and disputed the charge right there in the store. Never paid for the item, they never got the item back, I never used the item and I haven't stepped in a best buy again.
Cased Closed!
P.S.
By the way at one point I asked him how they handled returns for people that didn't have a drivers liscense and he said those people can't get their money back. So I asked if you don't drive you can't get your money back he said yes that's correct, but you can get a store credit. LOL
This is why I never leave home without my AmEx card. Never. They're probably the only card issuer out there that still defends the consumer when it comes to disputing charges. I'm willing to bet if every issuer implemented the same behaviour as AmEx, you'd see less retailers willing to chance that the customer might actually be smart enough to know how to file a dispute.