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