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