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