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