RockAuto.com Sold me a defective part that broke my truck! Brook Park WI Wisconsin

As a company they are responsible for the parts they sell and the costumer service for their sales. They are the ones responsible for the situation because they bought the part from the manufacturer and then sold it themselves; it’s the same idea as if you buy a used car and it’s a lemon, the dealer that sold it to you is the one responsible not the original dealer of the car. And there’s a difference between trash talking and calling someone out for bad products and bad service to go along with it, how would you feel if you bought something off the internet that broke something of yours that’s extremely expensive and then the company just completely ignored you? I’m also definitely not the only person that has had this issue with the company after researching it. And the only reason my son was in the vehicle isn’t because it was a "test drive,” we were leaving, I didn’t really have an option, I can’t just leave him by himself.

Perhaps the reason they are ignoring your complaints is because they didn't make the part, they are just a store.  They can refund your money, but that's about it. They don't have anything to gain by talking to you, especially since you are already trash-talking them everywhere on the Internet.  The party you need to be after is the actual manufacturer of the bearing.  

Also, you probably shouldn't have your kid in a vehicle you are test-driving after a repair.