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