is my visa valid after my foreifn expert has been cancelled?

I got a school that can do my Z type and on April this year on the 15th the Work Z type was out.

For the Summer holiday I went home and overstayed for 9 days but which I had already contacted the teacher in charge and written her emails. When I came back they told me they want to cancel my Work Z coz I was late and id ont want to look at the evidence of the emails and texts between me and the teacher in charge. So later they asked me to sign a letter of termination of contract which I refused. After a week the teacher in charge of the issue sent me a text that they will cancel my foreign expert and I can look for another job because the school that had helped them do the Z type has issues and the are very sorry...until know I dont know what to do...do I go to the immigration in my city where I got the Z and ask about it or do I stay continue looking for a job or should I go home or HongKong to change my Z?