I received a bad part. What should I do?

There is a user feedback thingy on the site somewhere. We should start using it when buying/selling parts here at FABO. Hopefully the guy who sold that bad box was not from here. Buying stuff sight unseen is risky and I have been burnt before too. So far only good in the MOPAR stuff. Even a parts car I paid for and did not go get for several months.