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