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