I own a garage and I bought a turn signal switch f...

I own a garage and I bought a turn signal switch from these people for my wife's truck and it was defective so I had to pay for another one in return me at the old one and they're making me pay for the shipping now how do I know this guy didn't drop it in the warehouse 15 times and breaking that's my responsibility right a million dollar company charging the little guy six bucks that's real nice don't ever do business with these people