foreign worker visa korea rules job change korea immigration work compliance foreign employment law korea LinkedIn Korea unpaid wages Korea expat career Korea Korea job search guide company closed Korea visa work in South Korea 2025 work visa korea visa sponsorship Korea unpaid severance Korea Seoul Global Center labor office foreign workers Korea foreign worker side job korea jobs in Korea for foreigners English jobs Korea labor rights foreigners Korea foreign worker reporting delay Korea employer no response Korea e7 visa job change korea workplace change Korea visa reporting deadline Korea teaching jobs Korea workplace change reporting Korea foreign worker resigning job korea Saramin severance pay Korea notice period korea foreign worker Korea Korean labor law foreigners job termination Korea foreigner foreigner jobs Seoul KOTRA job fair work visa korea rules freelance jobs Korea job change visa korea process foreign worker korea immigration reporting steps foreign worker unsafe work Korea employer shutdown foreign worker Korea unpaid wages foreigner Korea korea employment visa salary not paid Korea retirement pay Korea JobKorea labor office Korea labor office communication Korea XpatJobs quitting job Korea foreigner foreign worker resignation visa violation part time korea unpaid salary Korea foreigner part-time jobs Korea foreign worker severance Korea fired in Korea visa E-7 visa Korea foreign worker ghosted Korea change job korea visa foreign worker job change korea Kowork job change Korea non-teaching jobs Korea Korea job platforms foreign worker job change foreign worker mistakes Korea work visa status visa reporting timing Korea