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