Bakersfield Mitsubishi

I purchased a new 2007 mitsubishi. While under warranty my car radiator went out and car engine was damaged. Took car to dealer and was told that the radiator was an after market product that it was not the original radiator. They also told me that it appears my car has been involved in a front end accident because frame was damaged. And voided my warranty. My car has 70,000 miles on it and we have never had any work done to the radiator, and we have never been involved in any accident. It appears that the dealer sold us a new car that had been damaged in some accident. This is fraud because they had to know the car was damaged, i purchased car with 39 miles on it and there shop states that the cars damage was so severe it should have a salvaged title. has anybody had a similar experience with this dealer?. they have refused to help and havre accused me trying to pull a fast one on them.