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