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