Auto Town Inc. Refused to return my deposit. Hollywood, Florida

I went to the dealership traveling all the way from palm beach county to see a specific car, I made a deposit of merely $100 of which the dealer did write me a reciept for and informed me I could get my deposit back it I decided not to purchase the vehicle.  I decided not to get the car and he had promised me for months he would return my deposit once he sold the car.  I notice on craigslist the car had been sold, I phoned him and he said flat out he could not return my deposit.  I am a single mother on disability and he steals from me............what is capable of doing to others???