> third party replacement done (and kill your warranty)

Just a reminder to everyone in the U.S., it is illegal for a company to revoke an item's warranty if you open it up, have a third party fix it, etc. It's the exact same law that applies to cars: The Magnuson-Moss Warranty Act

If you're in a state where one-party consent audio recording is legal, it's a good idea to always record your conversations with customer service.