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