@Bebe ******
I try again. Your work permit allows you to work and you got that from the Ministry of Labor. You cancel the work permit, can be done in advance, at the Ministry of Labor. They are not allowed to do anything with your passport, like adding or changing stamps inside it. After you cancelled your Work Permit you visit the Immigration Office with your passport, those people are allowed to put stamps inside your passport. You cancel the stamp Extension of Stay permitted up to March 14th, with the documents you got from the Ministry of Labor. They will cancel this Extension of Stay and give you a new permitted up to date which match the last day of working.