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