Car Auction Won, can't redeem.

Hoping someone can help me with an auction that went bad last week.
I was bidding on a car and during the last 2 mins of the auction, I clicked “bid” and the auction seemed to lock up for 20 seconds or so and then it said I won. Very weird as I have won many cars before and this never happened.
The car cannot be redeemed. The car still shows “WON” a week later. I am also unable to report the auction. My money/credits have been taken also.
I was not sure if I purchased a hacked/modded car so I contacted the seller, but never had a reply back.

Any way to reset the auction to allow it to release. Any thoughts or help would be appreciated.

Send an email to forzafb@microsoft.com - include your GT, the sellers GT and the car and any other details. Make sure you give the email a decent heading and remember you will get an autoreply and may never actually get a direct reply (it may get fixed, but you may not actually get a reply though).