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