There is a legal website to visit, it's EFL-Law.com. This will answer a lot of your questions. If you work 8 hours in a row without a break, this is against korea's labor law. Please visit this website, and when you have a problem, quote the website to your director. Inform them that you will fight. They fire you knowing that you have to leave the country within 2 weeks. There is not much you can argue in two weeks. Tell them that you intend to return on a tourist visa, stay with your korean friends and fight the school. The best approach is post your letters in the korean newpapers. Your korean friends can help you translate. And post flyers everywhere in the school's area. Don't walk away, you have the power. Use it. Good luck.