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