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