Bought Battlefield 4 premium via the Origin website, content not available in PS store (PS3)

You are not going to like this but digital purchases via Origin are only for PC.  If you play on PS3 you must purchase digital content via the PSN Store or via a brick and mortar store like GameStop\Game, etc.  Since you have mistakenly purchased digital content on Origin  and you play on console you will need to contact a Game Advisor who can void your purchase and credit your account.  You can speak to a Game Advisor here:  EA Customer support:  https://help.ea.com/contact-us

1 Click on the following link: https://help.ea.com/contact-us
2 Make sure you are flogged in (top right corner)
3 Click on the blue button "Contact a Game Advisor"
4 Enter the name of your game or product (or "Origin" for account-related issues) and click "Find Solutions"
5 Select the type of issue and the platform you play on, and click on "Find Solutions".
6 Click on the blue button "I still need help" if the FAQ articles do not apply to your situation.
7 Select a contact option. Note that you may get different contact options depending on your country.