work visa status foreign worker job change korea visa violation part time korea employer no response Korea foreign worker reporting delay Korea work visa korea rules KOTRA job fair fired in Korea visa JobKorea job termination Korea foreigner visa reporting timing Korea foreign worker resignation foreign worker side job korea company closed Korea visa notice period korea resigning job korea foreign employment law korea foreign worker unsafe work Korea LinkedIn Korea English jobs Korea expat career Korea change job korea visa unpaid salary Korea foreigner teaching jobs Korea employer shutdown foreign worker Korea Kowork visa reporting deadline Korea labor office foreign workers Korea korea employment visa part-time jobs Korea foreign worker mistakes Korea work visa korea Korea job platforms Seoul Global Center labor rights foreigners Korea foreigner jobs Seoul work in South Korea 2025 quitting job Korea foreigner labor office communication Korea XpatJobs e7 visa job change korea foreign worker visa korea rules job change korea immigration work compliance workplace change reporting Korea foreign worker jobs in Korea for foreigners foreign worker job change visa sponsorship Korea Saramin freelance jobs Korea foreign worker ghosted Korea Korea job search guide job change visa korea process foreign worker korea immigration reporting steps non-teaching jobs Korea unpaid wages foreigner Korea