Shocks

I took my 2006 Nissan Pathfinder into Vacaville Nissan to have a bounce problem in the rear checked out. They said the problem was the rear shocks. The replaced those with OEM shocks. The bounce was worse that before the replacement. The tires would actually leave the ground on small bumps and the vehicle nearly flipped over on its side going over a railroad track. I returned to Vacaville Nissan but the Service Dept. was closed. The head new car salesmen checked out the car and stated that the shocks are too weak to support the weight of the vehicle. I returned the next day and there technician took the car for a test drive. He stated that there is a problem but there is nothing they can do because these are the shocks that their Book show for this vehicle. THEY KNOWINGLY ALLOWED US TO LEAVE THE DEALERSHIP IN A CAR WITH A DANGERUOUS CONDITION THAT COULD RESULT IN INJURY OR DEATH. THEY PROMISED TO FIX THE SHOCKS IF THESE DIDN’T WORK BUT FAILED TO TELL US THAT WE WOULD HAVE TO PAY 680 ADDITIONAL DOLLRS TO DO THAT.