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