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