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