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