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