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