Having customers delete all their data by mistake and then trying to recover it happens more often then you think. It has become common practice to soft delete at first. Usually 30 days later a hard delete is performed.

Oh, I know it happens. Over the years AWS has added functionality across various services to help prevent accidental deletion, but absent some documented behavior to the contrary, when a customer confirms that data is to be deleted, AWS is supposed to make that data completely inaccessible by anyone, including AWS themselves.

I updated my comment above because I have a theory as to what really happened here, and it doesn’t involve support recovering deleted snapshots.