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