When I transfer to NRT, they isolated us in an empty terminal during the whole six-hour layover. No vendors, just vending machines. Some of the furniture was shrinkwrap to keep us from using it. Then airport rustlers moved us to the departure terminal. I saw some strays, but the guards quickly rounded them. That was in August.
I was in USA and I called my credit card company, but they said it was being stop by Bangkok Bank in Hong Kong. The embassy uses BKK Bank. Try calling the bank.