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