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