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