Similar problem in Japan, the JR machines for purchasing the shinkansen and long distance trains don't seem to take overseas credit cards, asked me for a pin number that I don't have. I had to go into the office and line up, nearly missed my train last month in Fukui because of long queuing and then the 90 year old guy at the counter was pushing buttons on his terminal for 10 minutes before he could accept my card.Original Post Deleted