How can l get my deposit back?

Hello my 17 year old was looking for a car to drive to school and she saved her last two work check for a down payment. So she and l stopped at this Car lot because she seen a Malibu on the lot. They we're about to close but we did talk to a sellslady and she went over the price for the car and how much a month etc. So we couldn't test drive it because they were about to close so the sales Lady told us someone just asked about the car but didn't have the down payment of 1000 and l told her all my daughter had was 500.00 on her and she stated that they have a layaway plan and she thinks that it's about to be taking off the line soon of the other Customer comes back so my daughter really wanted the Malibu that's her dream car and was determined to get it first so we put the car on layaway and signed a paper stated we gave her 500.00 so we came back the next day to test drive it and the battery died on us 3mins away from the Car lot. So we called the sales Lady and she explained that she'