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