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