About three months ago, I bought a new 2014 Santa Fe Sport with the Technology Package. At that time, I was so surprised and excited that I was getting 28 mpg average. Three weeks after purchasing the car, I was rear-ended on the interstate. The frame was damaged and the bumper, back panel, and door had to be replaced. Also, when I first went to pickup the vehicle, the alignment was way out along with the steering wheel. I had to take it back to the repair shop to be aligned, and they said they calibrated the steering wheel.
Since the final repairs, my vehicle has had an average fuel efficiency of 24 mpg. Three questions - what could be causing this, how can it be repaired, and if it cannot be repaired - can I recover my losses from this?