korea employment visa foreign worker mistakes Korea Kowork labor office foreign workers Korea unpaid wages Korea foreign worker unsafe work Korea teaching jobs Korea visa violation part time korea job change Korea e7 visa job change korea employer shutdown foreign worker Korea employer no response Korea labor office communication Korea work visa korea rules fired in Korea visa visa sponsorship Korea workplace change Korea salary not paid Korea severance pay Korea company closed Korea visa English jobs Korea unpaid wages foreigner Korea notice period korea retirement pay Korea foreign worker ghosted Korea foreign worker severance Korea foreign worker resignation part-time jobs Korea XpatJobs work visa status visa reporting deadline Korea Korea job platforms expat career Korea Korea job search guide labor office Korea foreign employment law korea KOTRA job fair work in South Korea 2025 foreign worker visa korea rules job change korea immigration work compliance LinkedIn Korea Seoul Global Center foreign worker Korea job termination Korea foreigner E-7 visa Korea unpaid severance Korea jobs in Korea for foreigners non-teaching jobs Korea work visa korea labor rights foreigners Korea quitting job Korea foreigner foreigner jobs Seoul workplace change reporting Korea foreign worker visa reporting timing Korea foreign worker side job korea foreign worker job change korea Korean labor law foreigners freelance jobs Korea unpaid salary Korea foreigner resigning job korea JobKorea foreign worker job change job change visa korea process foreign worker korea immigration reporting steps foreign worker reporting delay Korea Saramin change job korea visa