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