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