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