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