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