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