call your credit card company, charge back, easy.
hopefully u paid with credit card
...Micro Center® reserves the right to decline any return or exchange where the product is not in "like-new" condition.
2. Unless you can prove that your motherboard was in pristine condition when you returned it, you don't have a case. Bent pins are user-induced issues. You're lucky that Microcenter will even replace it....Service parts, motherboards and processors may only be exchanged, and only if defective, within 30 days of purchase if in "like-new" condition.
If Micro Center don't 'test' motherboards when they get them back, then OP, looks like you damaged it yourself.
If they do, then there is a chance that the tech did it, and in that case, well, unless you had pics of the socket before, then it is your word against theirs.
It might also help if you did some research on the motherboard you want BEFORE buying it, and not be returning things for the sake of, it didn't have X feature. That just makes you look like a idiot, and the store don't want non-defective parts back.
I bought my SB & MB combo at Westmont, IL, but didn't do the exchange there. Went the ASUS route, though and glad I did. Never thought they could be that bad.
Straighten the bent pin, or see if it works as is.