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