Hello Mr Bunny and welcome to the Dubai job forums.
1. There are several terms used that need to be clarified. An employment visa is an entry permit for Dubai
that is valid 30 days (I can't remember if it can be extended to 60 days) and then expires. It doesn't get cancelled. A residence visa is a Dubai residency permit
usually valid 3 years and needs to be cancelled if leaving or transferred if changing sponsors. A labour card / work permit is applied for by your employer after you have entered the country on an employment visa, and in conjunction with a residence visa.
If all you have is an employment visa then once it expires, that's the end of your trip to the UAE until you apply for a new entry permit (or renew it if that is a possibility). There might be a grace period of 10 days but that's only something I heard from an immigration official once, so don't assume that's confirmed and always the case.
If you have a labour card and residence visa, then after Dubai visa cancellation process
, you then get a 30 day grace period to exit the UAE (or complete a new residence visa/work permit application). I don't know of a different grace period but check with the Dubai residence department
(and let us know what they say).
2. Usually if you overstay a visa, you get a fine on exit or when you legitimise your status at the relevant immigration department. Allow AED 100 or 200 per day. I don't think the CID spend a lot of time running after people in that position. People who have entered the UAE illegally (as opposed to those who entered legally but overstay) are investigated more seriously (I think by immigration officials rather than CID). See point 1 about visa cancellation.
3a. No, you don't have to leave the UAE to get a labour card and residence visa, you can transfer your status (or something like that - might be additional fees to pay).
3b. You might not have a ban in Dubai
if you didn't have a labour card in the first place. If you did, then moving to a free zone doesn't necessarily mean you avoid a ban - it's automatic unless you stay with the same sponsor (for example different company within
the same free zone), or various other exceptions apply. Check with the Ministry of Labour in Dubai
to see if a ban will apply in your case (and let us know what they say).
3c. No you didn't. It's not uncommon in Dubai for there to be a mismatch between job title on official paperwork and what you actually do.