tourist exit record Korea tourist overstay Korea consequences overstay clearance Korea esim korea korea entry requirements 외국인 택스 리펀 immigration overstay decision Korea korea sim card Tax refund in Korea missed last subway Korea 공항 환급 방법 tourist entry denial korea 서울 쇼핑 환급 tourist exit procedures Korea hospital visit tourist Korea korea mobile internet k-eta korea overstay exit risk Korea korea tourism guide late night bus Korea visa free korea taxi at night Korea korea travel tips 한국 세금 환급 tourist medical emergency Korea tourist visa rules korea illegal work tourist korea immigration risk VAT refund Korea Korea tax refund night transportation Korea travel to korea visa violation travel korea Myeongdong tax kiosk korea connectivity