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