Lost email account linked steam.

I've been trying to play titanfall 2 for 3 months now, i purchased the game but it keeps telling me to change the password of an account that's very old, even older than my current EA account, the issue is that i no longer have access to the email, plus i don't remember the adress, I'm not even sure if it's mine to begin with. 

All i know is that advisors aren't doing anything to fix the issue, they just can't seem to delete my account. I bought the game, i have it right there, I have proof, but it keeps telling me to verify the ownership of my lost email.

I am really desperate, and besides getting a refund and making a new steam account i don't know what to do. Can someone help?