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