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