English jobs Korea korea employment visa company closed Korea visa foreigner jobs Seoul foreign worker resignation notice period korea work visa korea foreign worker visa korea rules job change korea immigration work compliance visa reporting deadline Korea foreign worker side job korea foreign worker job change work visa korea rules Korea job platforms Kowork foreign employment law korea unpaid wages foreigner Korea visa sponsorship Korea labor rights foreigners Korea part-time jobs Korea XpatJobs Saramin foreign worker unsafe work Korea foreign worker job change korea labor office foreign workers Korea employer no response Korea work in South Korea 2025 employer shutdown foreign worker Korea jobs in Korea for foreigners visa reporting timing Korea foreign worker mistakes Korea change job korea visa visa violation part time korea quitting job Korea foreigner JobKorea LinkedIn Korea job change visa korea process foreign worker korea immigration reporting steps Seoul Global Center non-teaching jobs Korea KOTRA job fair Korea job search guide e7 visa job change korea resigning job korea work visa status teaching jobs Korea foreign worker ghosted Korea unpaid salary Korea foreigner freelance jobs Korea expat career Korea workplace change reporting Korea foreign worker fired in Korea visa job termination Korea foreigner labor office communication Korea foreign worker reporting delay Korea