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