@Tracy465 This guest sounds incredibly clueless. She can't even check her own bank account to see if the money was withdrawn? And she thinks you have access to her bank account details? Sheesh.
Tell her that hosts have nothing to do with handling the money exchange- that Airbnb deals with all that, and if she has questions, she should contact them. Even if you asked Airbnb, they wouldn't tell you a guests account details, that would be a privacy breach. If her booking was confirmed, then obviously the money would have been charged.
You might want to be vigilant about making sure this particular guest has actually read your listing info and house rules and understands what she's booked- she doesn't sound like the sharpest knife in the drawer.