How do I get my old mail back?

I have important emails with attachments and everything. I have the most recent aol. I moved them into the “saved mail” folder then I made a new folder and all of them disappeared from the saved mail folder, and the emails I had put in the new folder moved into the saved folder. Now I can’t find them in my inbox, or deleted items, or anything! Are they still there? I have searched them in the search box, and still no sight of them! They have to be somewhere don’t they?