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