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