@Ke***
, sounds like a good option, BUT you're not on a work permit because that doesn't let you stay here, it lets you work here WITH the correct visa ;) You are most likely now on an extension of stay that you got at the immigration office.
If that's the case you're on an extension of stay based on employment you need to cancel it before you leave the country. If you don't you will have problems down the road if you try to get another Non-Immigrant Type visa extension . .