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