I bought a Bose headset from a third-party seller on Amazon in 2017-12. The sound quality was poor. The computerized voice had a non-native English accent. The Bose iOS app would not connect to it.

I emailed Bose. They asked for the serial number and photos. They said "Yep, it's fake." That was all. They didn't even want to know who sold it to me. Amazon support also did not seem to care. They just told me to send it back.