ARC address change billing error foreigners Korea health insurance bill Korea foreign resident Korea national health insurance korea foreigners dependent insurance Korea address change Korea foreign resident fine korea housing problems after job loss Korea NHIS Korea foreign residents foreign resident bills Korea foreign resident bills korea overpay insurance utilities korea fix billing foreign resident tax Korea ARC bank account Korea address registration risk Korea address reporting korea foreigner insurance after unemployment Korea living in Korea mobile banking Korea moving in Korea Korean bank account local office notices foreigners Korea address registration foreigner Korea expat tax risk Korea healthcare Korea job loss mistakes Korea foreigner health insurance foreigners korea bank account Korea foreigner local office foreigners Korea HiKorea address report