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