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