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