I'm surprised by this. Could you link any of those threads by any chance?
If this was the case, you can usually get the car returned and refunded. I have bought from a similar site to copart and had a car returned. I also had a friend buy a Tesla that the insurance document said was an AWD, but turned out to be a RWD and they offered to take it back (he decided to keep it though lol, the blinders these cars put on us)
Buyer Beware, Scam car on Copart
PSA Copart lot # 32227518 is a scam