I think what I'd do is head for your native country's embassy and talk to somebody about your visa problems.

It sounds like you are in deep legal trouble and need some real legal advice in this f##ed-up matter. I'm sure your embassy can steer you in the right direction. Hopefully they can save you from paying out a several hundred dollars US just to get out of there.

I hope you make it out of this with your wallet intact and are able to continue teaching in China. I think if I were in your shoes and made it out fine, I'd count my blessings and never go back.

Good luck!

RK