KOTRA job fair work in South Korea 2025 resigning job korea visa reporting timing Korea JobKorea unpaid wages Korea foreign worker job change retirement pay Korea foreign worker side job korea E-7 visa Korea Kowork visa violation part time korea quitting job Korea foreigner Korean labor law foreigners teaching jobs Korea jobs in Korea for foreigners foreign worker mistakes Korea notice period korea foreign worker ghosted Korea foreign worker reporting delay Korea LinkedIn Korea XpatJobs expat career Korea job change visa korea process foreign worker korea immigration reporting steps salary not paid Korea workplace change reporting Korea foreign worker foreign worker unsafe work Korea Korea job platforms korea employment visa severance pay Korea labor office foreign workers Korea unpaid severance Korea e7 visa job change korea visa reporting deadline Korea workplace change Korea company closed Korea visa work visa korea rules work visa status job change Korea foreign worker visa korea rules job change korea immigration work compliance foreign worker Korea non-teaching jobs Korea work visa korea unpaid wages foreigner Korea job termination Korea foreigner labor rights foreigners Korea Saramin labor office Korea foreigner jobs Seoul Korea job search guide change job korea visa fired in Korea visa foreign worker job change korea Seoul Global Center visa sponsorship Korea employer no response Korea English jobs Korea labor office communication Korea foreign worker resignation part-time jobs Korea employer shutdown foreign worker Korea unpaid salary Korea foreigner freelance jobs Korea foreign employment law korea foreign worker severance Korea