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