account linking

You can refer to this link on how to connect your PSN account to Origin: http://help.ea.com/nz/article/linking-your-gamertag-psn-id-or-ea-classic-screen-name/

what it says: "Your Gamertag/PSN ID and Origin Account should be correctly linked when you first access an EA game online if you use the same email address for both. We recommend that you check your Origin account to ensure your emails match. 

If the email address for your Gamertag/PSN/PSVita ID is different than the address for your Origin account, connect them using the steps below:

1. Open the Origin client and click the Friends button, then Add a Friend. If you do not have the Origin client installed, you can download Origin for both PC and Mac.
2. In the Import Friends menu, you can choose to "connect" your Xbox LIVE, PSN, and EA accounts. Simply sign in with your account details to connect.

If you have issues connecting your account, you will need to properly link them by contacting a Game Advisor."

But err it should also work vice versa. you may need to contact a Game Adviser to unlink your account. :P Sorry thought you were needing to link your account...