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