Enterprise A cat eye fell off the spoiler, they refused to give me back the warranty Beauvaix France, Beauvai

I rented a car on the airport at Beauvais. It's a Peugeot 107. When I returned it, a cat eye in the spoiler was missing. I checked the other one and it was moving also, so most likely it fell off.

I filmed the other cat eye moving, I explained this is a hidden defect, it's not reasonable to be required to check if parts fall off the car. The renter said it doesn't matter, I should have checked this when I picked up the car and now the cat eye is gone so he has to discuss with his boss if he invoices me for the cat eye or not.