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