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