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