Korean labor law foreigners work visa status company closed Korea visa resigning job korea Saramin korea employment visa foreign worker job change korea foreign worker mistakes Korea expat career Korea work visa korea rules foreign worker resignation foreign worker side job korea foreign worker job change visa sponsorship Korea part-time jobs Korea non-teaching jobs Korea workplace change reporting Korea foreign worker unpaid wages Korea English jobs Korea visa violation part time korea employer shutdown foreign worker Korea job change Korea teaching jobs Korea foreign worker severance Korea Kowork foreigner jobs Seoul labor office communication Korea work visa korea E-7 visa Korea labor office foreign workers Korea job change visa korea process foreign worker korea immigration reporting steps unpaid salary Korea foreigner workplace change Korea KOTRA job fair change job korea visa Korea job search guide visa reporting timing Korea foreign worker unsafe work Korea Korea job platforms Seoul Global Center retirement pay Korea foreign employment law korea notice period korea severance pay Korea JobKorea labor office Korea XpatJobs job termination Korea foreigner LinkedIn Korea quitting job Korea foreigner foreign worker Korea foreign worker reporting delay Korea salary not paid Korea unpaid severance Korea unpaid wages foreigner Korea labor rights foreigners Korea employer no response Korea fired in Korea visa foreign worker ghosted Korea freelance jobs Korea e7 visa job change korea visa reporting deadline Korea work in South Korea 2025 foreign worker visa korea rules job change korea immigration work compliance jobs in Korea for foreigners