All my old hotmail emails, contacts etc are a gone.

I recently logged into my account and discovered all my old emails were gone! Last time I logged in, I had the Hotmail interface and all my emails were there. Now I have the Outlook interface, and they are all gone! I used this account since the late 1990s and had some very important correspondence saved there! Please let me know how to get my messages back (I already tried going to the Deleted Messages folder and recovering deleted messages and that did not work). 

I would rather have the emails from five years ago than the recent ones.

Thanks

Best regards