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