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