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