Hi there,
I'm really sorry to hear that you're unable to recover your account. Unfortunately, we're unable to help you with any account changes here at the EA Forums. What I can do for you is try to provide you with information that might assist you in recovering the account yourself.
This article contains instructions on what to do if your account has been compromised, please have a look and see if you're able to get your account back by following these steps: What to do if your EA Account has been hacked
If you can't get your account back, you can try contacting EA Help Support. I see you mentioned that you contacted them via chat, but you couldn't pass the verification process. Unfortunately, if you're unable to provide the information required for the verification process, there's nothing further we can do for you regarding recovering the account here at the forums.