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