this what support said: (Hi Joshua,
Thanks for reaching out, and I'm sorry that you think we have stolen your wallet! I can assure you that we have definitely not taken anything from you. Let me see if I can explain a little bit more about our services so that you can understand Xapo better!

In regards to the address change, Xapo has implemented a cool feature where users have multi-sig Wallet addresses, as well as rotating bitcoin addresses. You may notice that your Xapo Wallet address starts with a 3 - this means that your address has more security! Also, your address will change every time you use it to receive a bitcoin payment. Don't worry, though - if you receive any payments to any previously used Xapo bitcoin addresses, the payments will still be delivered into your account! We do this to ensure privacy for our users by not having every transaction you make be publicly visible with one bitcoin address blush. Additionally, I just checked your account and I can see you transaction history and you still have funds in your Xapo Main wallet! To find your Xapo Wallet address, simply click on the "Wallet" button on the top of the page and select which wallet you'd like to view. Then click on the "My Address" button and you will then see a popup screen displaying your wallet address blush.
As for your wife, would you mind sending me her email so I can look into her account and see if anything is missing?
Thanks again for the feedback, and I hope this cleared some things up for you and your wife!
Get back to me on the details of your wife's account so we can look into what is happening with her account!
Best,
Hillary
P.S. Take a peak at our support page! You'll be able to get to know Xapo and our services!)
But i did what she said but still can't find my old address.