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