I have a very similar, Although not quite as bad of an experience. My problem took place in Mainland China. there are many of these so called schools. Most are uncredited and they hire from abroad because people living in the area already know that they could make 5X as much money doing freelance work teaching people. So I think everyone should be aware. Also find out about your visas. I have been teaching in China with an F visa. It is illegal to teach with F visa. You must have Z visa to truly work in China. Also they break many laws for example, they pay cash so they don't pay taxes on you and they don't supply medical care, these are the 2 biggest laws they break. So I would advise you get ahold of someone who knows the area before shipping out.
I am not surprised by your response, it happens in America too. Companies have been busted tricking students to come to America to work while they go to school and they ended up being strippers or treated quite poorly. If this happens in a massive country like America, just imagine how much worse it could be for people going to less powerful countries.