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