unpaid salary Korea foreigner foreign worker job change korea foreign worker ghosted Korea labor office foreign workers Korea teaching jobs Korea foreign worker side job korea foreigner jobs Seoul jobs in Korea for foreigners Saramin foreign worker resignation foreign worker unsafe work Korea visa reporting timing Korea change job korea visa JobKorea workplace change reporting Korea foreign worker visa reporting deadline Korea part-time jobs Korea work visa korea rules resigning job korea quitting job Korea foreigner foreign worker visa korea rules job change korea immigration work compliance Seoul Global Center foreign worker reporting delay Korea freelance jobs Korea foreign employment law korea English jobs Korea e7 visa job change korea unpaid wages foreigner Korea labor office communication Korea job change visa korea process foreign worker korea immigration reporting steps XpatJobs KOTRA job fair visa violation part time korea visa sponsorship Korea expat career Korea work in South Korea 2025 company closed Korea visa labor rights foreigners Korea fired in Korea visa Korea job search guide notice period korea Kowork korea employment visa work visa status work visa korea employer no response Korea LinkedIn Korea employer shutdown foreign worker Korea non-teaching jobs Korea foreign worker mistakes Korea Korea job platforms foreign worker job change job termination Korea foreigner