[Hope]

Aww how horrible for you hun, I would be worried and angry too. But as all theo thers have said - Pickels is your now, you took her in and gave her love and attention that this girl didnt, that means more than any reciept for the pet shop.

I would be inclined to play Redames game, if she asks you for money for the hammy and the cage etc, say fine, but ask her to reimburse you for all the food, toys, bedding etc you have had to buy, if after all its 'her' hamster. I think you will find that she shuts up pretty quickly, but my guess is that she wont even come and speak to you. Do let us know what happens.