Enterprise Rental Car FALSELY accused of car damage Los Angeles California

I rented a car from Enterprise in the LAX area and they are now charging me $1,868.95 worth of damage that I did not do. The rep who showed me the car did not even do an inspection and left. Before I even left I saw the scratches and dents and such but I presumed that they must have had a pre existing report on the rental car. Now I am trying to get a hold of the damage recovery unit to speak to the person in charge of my claim. When I returned the car back to the same location they seemed to act surprised as if they had thought I got into an accident. How am I responsible for damaging the Roof Moulding when I hadn't even had any luggage or items put up there? There was also a deep scratch along the drivers side door that was about a meter long. I am sure that once enterprise decides to answer my calls that I will be able to prove that I am not responsible for a ridiculous $1,868.95. Even enterprise shoulf have cameras everywhere that can point out pre existing damages and a pre existing report on the previous rental. I am hoping to get in touch with a rep that will be able to give me access to these and I know that I will be able to dispute this false claim.