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