Enterprise Rent-A-Car

I picked up a rental car from Enterprise at/on Aug 2, 4:11 PM the lady handing the rental off to me took one picture of the front bumper and one picture of the back. I noticed the car having dents in the roof and front passenger fender area. then when I got inside the vehicle I noticed a deep hole in the carpet from wear and tear, I did not take pictures of these issues because since I was picking the car up like this I figured it was already noted that the car was in this condition. upon returning the rental car, I received a Voicemail stating the car was good and everything looked great from enterprise. But This other company is claiming I did the damages to the rental car that were previously on the car when I received the vehicle. I feel like this is sever negligence on the employees behalf at the enterprise. this is extremally troubling and I contacted my insurance company but this feels like a scam and a racket enterprise is doing to customers. I am having sever anxiety about this because I did not damage this vehicle I returned it in the same exact condition I received it in minus the milage. even the check engine light was on when I received this car from enterprise