Battlelog

First BF4 is M18 and you are 18,is your birthday over yet?

Second the game is registered under your younger brother so game is already registered to him permanently,his account will be a limited account meaning certain games,he cannot play at all.

You need to contact EA game advisor DIRECTLY to get it change then,only they have the tools and authority to go into your account to change for you.

Have his details ready too because game is in his account.

For any issues regarding accounts, please follow these steps to contact a game advisor for more help:

1. Click the link https://help.ea.com/en/contact-us/ask and log in with your Origin name and password.

2. Where it says: ’What Can We Help you With’, type in ‘GAME NAME’

3. Click Find Solutions

4. Select "Your problem,eg accounts" from the drop-down list and also select your platform from the list.

5. Click: Find Solutions

6. Scroll down a little and on the lower right hand side, Click "I Still need Help"

Picture to help you understand better,  https://help.ea.com/article/welcome-to-the-new-and-improved-ea-help-center

If live chat is gray, change your country to US and make sure you're on US Business hours. It might also gray because they're very busy. Try later.

The Window Will Open...
You’ll now see the currently available contact options(Depending on your game). These may vary depending on your geographical location and the time of day. Phone or Live Chat are the best options.

For customers in North America:

• Select "Call me."
• Enter your phone number.
• Select "Submit."

For Customers outside of North America:

• Go to the "choose a contact method" section
• Contact us using the telephone number provided within the listed opening hours

Please be aware that it is likely that the agent you speak to will need to confirm your personal informations on this account.

Hope this helps
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***Please note...I do not work for EA/Origin. Questions belong in the forums,Solution is like medicine,same medicine/solution may not work on same problem.I'm helping you because I'm also a victim of EA for releasing their half baked products to us,gamers.

I don't answer questions via PM.  AHQ is "Player-to-Player" technical self-help forum