Sky rent a car Antalya - avoid!!!!

I just spent one week in Turkey. I rent frequently cars everywhere I go. It never happened to me before to meet such dishonest company. An employee was rude, offensive and tried to cheat us.
I paid for a car in advance. When I dropped a car at the airport, an employee named Gokhan, said there is a problem and he has to contact a boss. First he tried to cheat us on petrol (we got a car with almost empty tank and we gave it almost half full), then he tried to find some non marked earlier scratches. All his actions aimed us to pay extra money. He said repeatedly they can force us to miss our flight. When I saw in which direction it goes, I took the car agreement and approached a policeman at the airport (btw, “SKY RENT A CAR” has not an office in the airport, they bring a car there for you). In few minutes some other guys from this car rental company showed up as they allegedly witnessed the situation and that we didn’t pay for a car.
I tried to explain the policeman situation and showed him payment confirmation on a car rental agreement. He seemed to be on our side. When more of the airport personnel approached to help and policeman contacted someone by walkie talkie, all employees from “Sky rent a car” suddenly left.
My girlfriend was shocked and scared, this was a terrible holiday ending.
We heard later, that one day before, some other girls from our hotel had similar situation with this car rental company.
Avoid this company “sky rent a car” from Antalya. They are cheaters. “SKY RENT A CAR” from Antalya IS NOT TO BE RECOMMENDED.