LinkedIn Korea Saramin foreign worker reporting delay Korea foreign employment law korea visa sponsorship Korea quitting job Korea foreigner company closed Korea visa work in South Korea 2025 foreigner jobs Seoul fired in Korea visa employer shutdown foreign worker Korea work visa korea rules foreign worker mistakes Korea Kowork freelance jobs Korea JobKorea labor office communication Korea notice period korea foreign worker job change korea unpaid salary Korea foreigner unpaid wages foreigner Korea foreign worker resignation Korea job platforms e7 visa job change korea Seoul Global Center XpatJobs foreign worker job change jobs in Korea for foreigners korea employment visa labor office foreign workers Korea foreign worker unsafe work Korea labor rights foreigners Korea part-time jobs Korea visa reporting timing Korea teaching jobs Korea English jobs Korea work visa korea resigning job korea expat career Korea work visa status non-teaching jobs Korea foreign worker ghosted Korea Korea job search guide change job korea visa employer no response Korea job termination Korea foreigner KOTRA job fair