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