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