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