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