work visa korea rules unpaid wages foreigner Korea foreign worker resignation Korea job platforms resigning job korea expat career Korea foreign worker job change XpatJobs non-teaching jobs Korea foreign worker ghosted Korea work visa status labor office communication Korea e7 visa job change korea Seoul Global Center foreign employment law korea English jobs Korea work visa korea Korea job search guide korea employment visa teaching jobs Korea foreign worker job change korea company closed Korea visa foreign worker unsafe work Korea work in South Korea 2025 visa reporting timing Korea LinkedIn Korea labor office foreign workers Korea foreigner jobs Seoul jobs in Korea for foreigners employer shutdown foreign worker Korea change job korea visa Kowork freelance jobs Korea part-time jobs Korea unpaid salary Korea foreigner Saramin notice period korea quitting job Korea foreigner job termination Korea foreigner foreign worker reporting delay Korea foreign worker mistakes Korea KOTRA job fair employer no response Korea labor rights foreigners Korea fired in Korea visa visa sponsorship Korea JobKorea