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