I am so sorry for your loss of you beloved pet, and for the lack of closure you now have due to this mistake. I agree that a refund would be in order. That said, I kind of like Barkingdog's idea about the photo's. It would be sharing a piece of your pup. Your pet knows you loved her dearly and will not worry about this as you will. Cherish the good memories and try to move on from this awful experience.