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