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