foreign worker reporting delay Korea change job korea visa unpaid severance Korea KOTRA job fair labor office Korea employer no response Korea foreign employment law korea job change visa korea process foreign worker korea immigration reporting steps visa violation part time korea resigning job korea foreign worker job change Korean labor law foreigners Saramin salary not paid Korea foreign worker Korea visa reporting timing Korea visa sponsorship Korea JobKorea XpatJobs foreigner jobs Seoul severance pay Korea English jobs Korea foreign worker visa korea rules job change korea immigration work compliance Korea job search guide e7 visa job change korea job termination Korea foreigner LinkedIn Korea korea employment visa foreign worker job change korea E-7 visa Korea Seoul Global Center labor rights foreigners Korea teaching jobs Korea unpaid wages Korea foreign worker resignation retirement pay Korea Kowork foreign worker severance Korea fired in Korea visa unpaid salary Korea foreigner workplace change Korea foreign worker side job korea visa reporting deadline Korea freelance jobs Korea foreign worker unsafe work Korea jobs in Korea for foreigners work in South Korea 2025 part-time jobs Korea Korea job platforms foreign worker ghosted Korea foreign worker mistakes Korea notice period korea employer shutdown foreign worker Korea company closed Korea visa expat career Korea unpaid wages foreigner Korea job change Korea work visa korea labor office foreign workers Korea quitting job Korea foreigner work visa status non-teaching jobs Korea workplace change reporting Korea foreign worker work visa korea rules labor office communication Korea