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