Cash Rewards Inc CRI Stole my $6000. Coppell, Texas

I purchased a quad on June 21, 2007 from Preferred Motors in Fallon Nevada that was advertised as having a $6,000 rebate. I filled out my paperwork and had everything ready to mail in my 6,000 certificate for cash rewards in July of 2010. I decided to check Cash Rewards Inc website and when I did a google search for it I found out that the PO Box is closed and Cash Rewards Inc is in bankruptcy. I want my money. I could have purchased a quad from a local dealer for $2,000 less, but drove 2 hours to receive the promised "rebate" by Preferred Motors advertising.