AD account was erased and can’t recover the content from the site

To manage our users, we linked our Confluence instance to MS Active Directory. One of our users manages to make content and posted it in the Wiki.
Few days later, their AD account was erased. When we search their content in the Wiki, we can’t find it anymore.
How can we recover the content if it has been deleted from the site?
Is there any other way?
We need your help.
