Traded for a bad car?

-about 6 months ago me and my fiance traded in an 05 F-350 ($500 a month) for a 09 chevy cobalt ($200 a month) the carfax report had nothin worng with it, and still under warranty, anyways it turns out that it was wrecked and whole new engine and all that was replaced so it was deemed to be too much to fix, we were still in the deal though so we had a choice in 3 other vehicles but somehow all 3 vehicles were more expensive so we chose an 09 honda civic($354 a month) is there something we can do, or did we just wait to long? We couldn't get the F-350 back because had already been soldlol all those cars you are talking about are bummy cars with plastic seats that look like leather... if you want a car that will last forever and has a really nice interior get a "LEXUS IS" both you and your wife are going to love it its smooth and sporty.