Round trip from the airport to the hotel, didn't drive much

The staff were very impatient when we picked up the car. The customer hadn't finished checking, but in less than five minutes, the staff left. They didn't provide the paperwork initially; we had to chase after them to get it. There were some paint scratches on the car, which they didn't inform us about. I found them myself and only then did the staff reluctantly mark it on the paperwork. Before we could finish inspecting, it started raining heavily, and the one staff member left without saying anything. We had no choice but to drive away without fully checking the vehicle. When returning the car, they inspected it very meticulously, even crawling on the ground to look, and claimed there was a crack in the bumper. However, we had only driven from the airport to the hotel and hadn't used the car for the three days, as we stayed at the hotel and used the hotel's shuttle service. The mileage check confirms this. The crack was clearly old, and we had to argue with them. Eventually, their manager came and resolved the issue, but we almost missed our flight. Additionally, the deposit is extremely high, nearly 5000 RMB. As of now, we haven't received the deposit back, and we don't know if they'll deduct any money. Make sure to thoroughly inspect every part of the car when picking it up.