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