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