Botha *****ed towing services

I was involved in a car accident and they were the towing services that helped us. They towed the car to my house and offered to buy the car. I said yes and they came to fetch the car the next day from my house and promise to pay me the next day. Two weeks later and they still didn't pay so I ask for my car back. He now said I must pay him storage of R10500. I ask police to help me and they say they know him and this is how makes his money. By *****ing people this way.