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