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