When you quit, did you tell them that you are going back to your home country or did you tell them that you had another employment opportunity?

This happened to a friend of mine here in Chongqing...wrong stamp because he told them he was going home, not to another job! So he had to wait until all his contracts and papers were expired, applied for an L, left for HK to get his Z through the new school!

You could contact the foreign expert bureau...it's their job to deal with crap like this...although you may be told that you need to "negotiate" with you school to get the right paper/stamp....(sometimes it's hard to beat the annual envelope the bureau guys get, especially from your school)....your last shot is if the bureau doesn't do their job, then you go to the human rights commission....you'll probably get everything the next day! My friend did!

Cheers and goodluck!