Moving back home

I am Kacey, and I just graduated high school. I was offered a move in nanny job only for the summer and flew to Hawaii with this lady. I was told that she would pay me, have a car to drive, and that she would pay for my ticket back home. She hasn't been paying me, I do not have a car to drive, so I am stuck at the house all day everyday with her kids, and now she is saying she can't get the ticket to fly me back home. My parents or family do not have the money to help me get home. I quit my job for this nanny position and spent all my saved up money on my college classes coming up this Fall semester. The money raised is going towards a plane ticket (about $300), an uber to the airport and home from the airport. My classes start August 12, so if I could reach my goal before August it would be greatly appreciated. Without going home, I will be behind a whole semester of school and a couple thousand dollars put to waste. Anything will help, even just telling others about this. Anything I don't use or raise more than the goal will be donated to a charity of mine or mine and my peers choice. Thank you for taking the time to read this.