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