My girlfriend and I know exactly what you are talking about and really feel for you. We went though many of the same problems. At one point we agreed that we had to breach our "contract" and get out of China. We had a sneaking suspicion that something bad was going to happen soon just from all the talk about the shady stories about the Chens.

What we did was got out plane tickets bought and ready, got a taxi in the middle of the night to take us to the bus station, the bus to Wenzhou, than a taxi to the airport. Everything was planned out and went smooth.

We had such a hard time coping with the living there with rock hard bed, seeing people defecate on the streets openly, never seeing the sun due to poor air quality, the only decent food we could find was BBQ chicken heart (Actually enjoyed that), and always feeling like we had to be on guard. This on top of all the problems you listed with the school was enough for us to justify leaving abruptly. We knew if we mentioned that we weren't happy with anything or as such that the Chens would most certainly put hired eyes on us.

We hope you can get out safely and undetected.

Be safe.

Where are you from originally by the way. We are from British Columbia, Canada.
-Jason & Sara