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