How can I acces the private family member of a lost account?

Hello,

Well, years ago I had an account in whcih I started creating my family tree. I have been able to annex these people to my new account's user name. But my only living grandma's acestors seem to be blocked because I know I have put their names but I cant even search for them. I have no way of recuperating that account, i do not recall either the name nor the email y used. My name in the forme account was as follows "@EnzoSaccoccia Caggiano1 instead of @EnzoSaccoccia Caggiano as it is now. I have sent a message to my forme account aside from a rquest to acces his family tree. But obviously I wont receive any message back.

I want this information because some of it is only present there, i have no other record as the person whom i had interwied has passed away.

What can i do?