I am in need of reverting a document back to its last version in web-based Acrobat

I accidently made changes to a document in Acrobat web based version, asked the chat help how to not save them and they siad to just close the browser but when I then reopened the document the changes were saved. Is there a way to put it back to the original version or am I better off to delete and reuplooad the document which is actually my resume