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