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