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