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