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