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