change job korea visa foreigner jobs Seoul company closed Korea visa work visa korea rules KOTRA job fair foreign worker job change korea unpaid salary Korea foreigner employer shutdown foreign worker Korea foreign employment law korea job change visa korea process foreign worker korea immigration reporting steps e7 visa job change korea labor office foreign workers Korea Seoul Global Center foreign worker visa korea rules job change korea immigration work compliance foreign worker job change Korea job platforms work visa korea fired in Korea visa notice period korea unpaid wages foreigner Korea XpatJobs resigning job korea teaching jobs Korea labor office communication Korea foreign worker resignation LinkedIn Korea work visa status expat career Korea visa violation part time korea foreign worker reporting delay Korea quitting job Korea foreigner work in South Korea 2025 non-teaching jobs Korea English jobs Korea job termination Korea foreigner foreign worker unsafe work Korea workplace change reporting Korea foreign worker labor rights foreigners Korea Saramin Kowork foreign worker ghosted Korea foreign worker side job korea Korea job search guide foreign worker mistakes Korea JobKorea visa reporting timing Korea freelance jobs Korea visa sponsorship Korea part-time jobs Korea visa reporting deadline Korea jobs in Korea for foreigners employer no response Korea korea employment visa