@Johnny *****
, actually you're a little off base. NO ONE can cancel a valid visa :/ If you stop work and cancel your work permit BUT are on a valid VISA it doesn't cancel, and you can stay until it expires
BUT
If you are on a yearly extension of stay (where you do 90 day reporting) you need to take the receipt of canceling your work permit and documents from your company and go cancel the extension of stay.
Failure to do that will cause you grief down the road if you're ever gonna work again here.