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