Like any country there will always be a percentage of businesses that are crooked. There is only one way to ensure that you do not loose any money and that is to make sure you never part with any substantial amount without getting the flying. A small deposit to secure a position is enough and then pay as you go. Never pay for everything (including accomodation) up front. This means if the school does not suit you you can then move on without any substantial loss.
NEVER PAY UP FRONT!!!
Another tip is to get references. All schools have alumni. Find out from them what the true situation is. If you feel uncomforatble then move on - there are a large number of schools that will give you the service you want so don't waste time on suspect ones.