What can I do with a 30 day humanitarian visa when switching companies and getting a z work visa?

Hi the idiots in the HR at my old company accidently canceled my residence permit when I was switching between companies and now I'm on a 30 day humanitarian visa (can't remember the name). Can I extend this and go to Hong Kong to apply and receive the z work type entry permit? If not would there be any problems getting a tourist L type or business M type (my company can provide all the paper work) going back to china then going back to Hong Kong to get the z paper?