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