I don't really desire any negative outcomes for her.

It was just personally disappointing because I incurred not only the deposit, but other costs to set aside time to session with her.

Like others have pointed out, an amazon giftcard isn't the best way to go about a deposit, but it saves Paypal fees, and I wrongly thought things couldn't go wrong with an established domme like her.

It's just a lesson learnt for me that even with a famous or established domme, things can go wrong.