Great advice, friendly people, and lots of frogs!
First, welcome to the forum. Second, I'm sorry for your bad experience with your White's. I don't think that there was much hope from the start, unfortunately. Have you checked out the care sheet that Kurt wrote, Frog Forum - White's Tree Frog Care - Litoria caerulea ? I'm planning on getting 1 or 2 in a few months and have been searching the web for any information that I can gleen. I hope that your new one has a better outcome. Good Luck to you.