Hi there Zeb sorry this happened to you....it's called a " purge" in the UK and has happened to me 3 times! It was the same ATM at a Barclays bank branch and only on one occasion did I "fumble"( or rarther my kids did). Fortunately it was only £20 each time. The one time I was using that particular banks debit card( Barclays) I received the money back.
But on two occasions I was using another banks debit card ( Santander) and I didn't receive the money back. I hope you get it back asap.
As if they're not rich enough already!!!