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