I was trying to buy this car in an auction and it said I did not have enough credits which I clearly did and it took my credits but did not give me the car. I tried buying a different car and it did the same so I lossed 400,000 credits
Please see the README thread pinned above. You can submit a ticket at Forza Support for the team to investigate your details.
If support doesn’t help you then PM me details of a car you list and I’ll buy it for half a mill.