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