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