Originally Posted by
basuspendedmyticketfornoreason
Avios are deducted from my account + taxes are debited from my bank card.
If this was a debit card, there also could have been a bank card fraud alert. My bank has to be notified for these sorts of purchases. It will initially appear to go through, but if I have not told them I am traveling, it gets flagged as fraud until I clear it up, which usually means rerunning the purchase. Amex sometimes does this as well. Depending on the taxes and fees, the amount and travel itself could be part of it and when it was flagged, BA also did? I only use a debit card for ATMs when traveling, but I have learned to always tell them if it's outside the US travel, even to withdraw £20 from an ATM in Scotland.