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