If this has been litigated and gone before a judge your only option is to appeal.
If you show up in a response to an advertisement, the car you wanted was not there, and you accepted a different car, knowing it was a different car, the false advertising claim is probably exhausted.
If you were represented at trial, this would be a question for your your attorney. Even though false advertising is exhausted, lemon laws might have applied. If you didn't raise lemon law issues (if they exist in your area) at trial and your case is finished you might be out of luck.
You should discuss the details with an attorney in your area.