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