Last week, I went to Walmart in Mountain View CA and used my FIA AX Rewards with a Chip and Signature. When I swiped the mag stripe, the register returned the "ICC Detected" message and instructed me to insert the card into the chip reader slot.

I got a message acknowledging the insert. The terminal even said "FIA American Express PLEASE DO NOT REMOVE CARD."

However, the transition didn't go through. she said it was rejected by the bank, but the receipt says "Customer Cancelled Transaction" which was not true. I didn't remove the card until the screen cleared.

Is there a keystroke for the cashiers to force the transaction as a swipe instead of a chip read when the chip read doesn't work?

Anything else I can do to make it work? I prefer to use this card.