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