Complaint Review: Enterprise Car Rental

I rented a car for two days from Enterprise Car Rental in Jacksonville FL. The car had over 32,000 miles, scratches on the exterior and stains on the interior along with obviouse wear and tear. Prior to taking the car I did a walk-around to look for damage. When I pointed out the scratches, the agent said they did not matter as long as they did not go though to metal. I put 200 miles on the car and returned to the Jacksonville Airport location. At the airport, the staff stooped over at the front grill and pointed out that the black plastic grill had damage to it. It was on the lowest rung of the black plastic grill and is difficult to see whithout stooping over. The damage did not occur while I had the car because it would have had to occur when the car was moving and I would have heard it. I am certain the damage did not occur when I had the car. Enterprise has sent me a bill for $811 for repaiir, loss of use and loss of value - for minor damage to the lowest section of a plastic front grill on a car with over 32,000 miles, scratches, stains and wear and tear. The bill included dramatic pictures of a car with the bumper pulled away from the car and another poor quality photos of the grill that is incongruent with the photo I took at the airport when they pointed out the damage. It appears that have sent me photos of a different car. I have asked Enterprise repeatedly about the photos and they have not addressed it. The manager at the Jacksonville Enterprise told me the Loss Recovery Department would be transparent and provide me documents showing there was no reports of damage to the car when it was rented. Enterprise has not sent me the requested documents. They are not threatening me with taking the bill to collections which will damage my credit rating. Enterprise has also not addressed my complaint that when I did the walk around pre-inspection of the car, the car in a garage with the front end close to the wall which limited my ability to see low on the front grill. You have to stoop to see the damage or stand back 4 feet or more. I firmly believe Enterprise is charging me for damage that was pre-existing on the car but I was not able to see it as it was so low on the front grill and my view of the front grill was limited by the car being parked in the car with the front close to the wall.