labor office foreign workers Korea Korea job search guide foreign worker resignation employer shutdown foreign worker Korea foreign worker reporting delay Korea Seoul Global Center expat career Korea foreign worker job change work visa status Korea job platforms visa violation part time korea LinkedIn Korea part-time jobs Korea workplace change reporting Korea foreign worker KOTRA job fair foreign worker visa korea rules job change korea immigration work compliance visa reporting timing Korea work in South Korea 2025 job change visa korea process foreign worker korea immigration reporting steps labor rights foreigners Korea korea employment visa labor office communication Korea change job korea visa visa reporting deadline Korea fired in Korea visa foreign worker mistakes Korea foreign worker unsafe work Korea work visa korea freelance jobs Korea work visa korea rules non-teaching jobs Korea job termination Korea foreigner foreign worker job change korea company closed Korea visa resigning job korea e7 visa job change korea notice period korea foreign worker side job korea English jobs Korea unpaid salary Korea foreigner foreign employment law korea foreigner jobs Seoul foreign worker ghosted Korea JobKorea visa sponsorship Korea quitting job Korea foreigner teaching jobs Korea Kowork jobs in Korea for foreigners unpaid wages foreigner Korea employer no response Korea Saramin XpatJobs