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