2016 Dodge Challenger drivetrain & axles problems

Was taking off from a red light, got to about 15 MPH and there was a loud bang and I felt it from under the car. It then felt like I was dragging something under the car, but that couldn't be as I was behind another car and if there were something in the road, they would have hit it. I managed to pull over to the side of the road. I put it in park and tried to turn it off. It wouldn't turn off and the "P" on the shifter was blinking and so was the "Run" light.

Caxmax sold me a car that my mechanic described as flood damaged up to the body line just below the window. Rust from the engine to the exhaust tips. Rocks and sand in all body cavities on the underside of the vehicle. I conveyed this information to my salesman who facilitated a refund. I included photos. A week later it was back on the carmax south sacramento website (where I bought it) with updated mileage information and no mention of the flood damage.