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