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