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