foreign worker severance Korea work visa korea rules korea employment visa LinkedIn Korea XpatJobs E-7 visa Korea KOTRA job fair teaching jobs Korea foreign worker job change korea foreign worker unsafe work Korea notice period korea job termination Korea foreigner unpaid wages foreigner Korea salary not paid Korea JobKorea non-teaching jobs Korea English jobs Korea job change visa korea process foreign worker korea immigration reporting steps retirement pay Korea labor office foreign workers Korea change job korea visa work visa status labor office Korea visa reporting deadline Korea Korean labor law foreigners fired in Korea visa labor rights foreigners Korea job change Korea unpaid salary Korea foreigner work visa korea labor office communication Korea employer shutdown foreign worker Korea expat career Korea part-time jobs Korea visa violation part time korea company closed Korea visa foreign worker resignation quitting job Korea foreigner foreign worker mistakes Korea foreign worker side job korea foreign worker visa korea rules job change korea immigration work compliance workplace change reporting Korea foreign worker unpaid severance Korea foreign employment law korea work in South Korea 2025 foreign worker reporting delay Korea Saramin foreign worker job change foreign worker Korea Korea job platforms foreign worker ghosted Korea severance pay Korea e7 visa job change korea Seoul Global Center Kowork jobs in Korea for foreigners employer no response Korea visa reporting timing Korea foreigner jobs Seoul freelance jobs Korea visa sponsorship Korea Korea job search guide resigning job korea unpaid wages Korea workplace change Korea