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