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