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