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