Hey there,
I'm sorry to hear your account has been compromised. Please follow the steps in this article to re-secure your account: What to do if your EA Account has been hacked
If you need any further assistance to regain access to your account, you will need to contact EA Help Support. As you mentioned the case has been closed and you didn't receive any replies, please try reaching out to chat support:
- Go to: https://help.ea.com/en/help-home/
- Select the game you need assistance with or EA App
- Select "I want to update my EA Account information"
- Scroll down the page to find the "Chat with us" option
If the chat doesn't show up, please try doing that while logged out. Once selecting the chat option it will ask you to log in, but you can select the option to continue without logging in.
I hope this helps!