I rented a car, and the Valet Parking person at the Hotel hit the car. I didn't know about the damage until I returned the car. How can I make him pay for the repair?

I rented a car from Enterprise, and the Valet Parking person at the Sheraton Hotel hit the car. He didn’t tell me about the damage, and I didn’t know about it until I returned the car to the rental company. It’s going to cost over a $1,000 to fix it and I don’t have the money. Besides, neither my credit card company nor my insurance policy covers it. I really feel terrible to be responsible for something I didn’t do. How can I make him pay for the repair?
Please share if you have ideas.