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