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