Not sure why you think that particular car is the problem but you need to click the ? In game and send in a ticket. Give all info such as device, operating system, ign and any other relevant info. Last I saw was a 17 business day wait.
Unfortunately that is a common scam to get a good car. You did good when the "red flags" were raised. Never trust the free car scam. Some are legit but 99.9% are not.
Most likely because he was in a 1621 he ASSUMED he couldn't be beat. He may not have known how to drive his car to get the best time out of it. I wouldn't worry about it.
This was discussed many months back and it was determined that 2 or 3 were/are faster supercharged. I don't recall which cars though. Too be honest, Kenny would be the one that knows. I believe he was part of that discussion.
My first ford gt. I was new and it was my first team. I loaned it to a teammate for turf. He ended up leaving the team with my car. I'm STILL hot about it 2 years later lol.