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