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