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