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