I made myself under 18 accidently and i cant change it

@memocan1907

There is also another way to change your DOB.  Follow the steps below:

To change the e-mail address, follow these steps:

1. Go to http://www.origin.com and Sign in on the top of the page
2. Scroll over "My Account" and Click "Privacy Settings"
3. Then click the "About Me" Tab on the left
4. Click "Edit" next to "Basic Information"
5. Enter the security code that has been sent to either your e-mail or your phone (whichever option you have set up), or it will ask you one of your security questions
6. You can now change your DOB

This allows you to change your e-mail, username and date of birth

If you are not able to do so, then you will have to follow @Carbonic's advice and get in contact with an EA Game Adviser.