<prompt> Human: I live in a city in Brazil. I have a Visa debit card from a Federal Credit Union in the USA. My usual way of transferring money is to withdraw cash from an ATM at the Banco do Brasil, using my Visa card. I always withdraw R1000 Brazilian Reais about US400 . But last Friday, the transaction failed with communication error, and no money was dispensed. However, when I check my FCU account online, I see that about US400 was withdrawn via the Banco do Brasil. I have used the card since, and see no indication of fraudulent transactions, it looks more like a technical problem. What should I do to get a refund?  <response>: Call your bank. 