Ruined by the disgraceful hertz guy taking the drop off

The Hertz representative at the drop off tried to rip us off. He tried to charge us €120 because there was a little sand in the car. We had two children in the car one was sick the other sleeping, he woke our sleeping child. We were forced to drive to a garage to hover the car and had to do the cleaning in the pouring rain. I believe the hertz guy threatened us with a huge bill so we would do his job for him so he wouldn’t have to get wet in the rain. He was a disgrace. He also left the door unsecured so when we drove away our child’s door was not secure.