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