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