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