everybody! So I'm trying to update our website,

Hi everybody!

So I'm trying to update our website, and I've created a page but then accidentally overwritten all of the content with stuff for another page. So I thought "I'll just go back in the revisions and change it back" but the revisions aren't there anymore on WordPress 4.5.2.

I've spent about 5 minutes just pressing 'undo' on Upfront but it doesn't seem to be changing anything, please can somebody help?