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