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