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