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