My best friend died on March **th. Less than * weeks after her death her Facebook page...

My best friend died on March **th. Less than * weeks after her death her Facebook page was gone and my last ** years of Facebook messenger history was gone. I can see my messages to her, but an error is in place of her messages stating that the content has been removed because it was abusive or spam. This is not possible. I am not sure if her account was hacked after her death and someone posted something spammy or abusive under her account but there is no way it was her. I still have my messages from other friends who have deactivated or deleted their accounts. I would like to be able to retrieve her messages so that I have them to keep. I would have copied and pasted them had I known this would have happened. We have been best friends since Kindergarten and she had cystic fibrosis which is what led to her death. Her account would have been linked to her email *****@***.com and her name was Andrea Naumowicz.