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