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