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