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