Refund policy on in game store

My 8 year old daughter made an accidental purchase when i was away from the computer with in game currency.
I was informed that all in game store transaction are final and cannot be refunded or reverted.
I think that amazon support team should find a way to restore in game currency for transactions like that.
I know that its not real money but there is room for improvement specially when there a lot of mmo out there that support this feature.