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