How can I access an account that I dont remember the email?

Im new to poe2. I started playing and wanted to make a trade. Made a new account and could not trade. End up finding out I had an old account. Dont know how since I only play Poe1 like 10 min and uninstall it many, many years ago. The thing is that my character is in an old account that I dont even remember which email it had and dont have access to it. I merged both accounts thinking it will solve the issue and nothing. My question is: how can I access that old account so Im able to start trading? The only other account I had at the time was stolen eons ago. Is there, lets say, a way to access the other account by entering by the new account. Otherwise I wont be able to trade and will loss a lot of things I want to do. Im also level 49 in act 1 cruel. I dont want to start a new character.