Just piggybacking off this comment since you mentioned you bought Premium discounted, but right now Premium upgrade for owner's of the basic version of BF3 is available from Amazon for $7.99:
Or the full BF3 + Premium for $9.99:
Since all DLC's are required to play this mod, right now you can get the Premium upgrade (with all 5 DLC's) if you're an owner of the basic version of BF3 from Amazon for $7.99:
https://www.amazon.com/Battlefield-Premium-Service-Online-Game/dp/B0087STJLS/ref=sr_1_2?crid=1MHI9OWZMHF8B&keywords=battlefield+3+premium&qid=1658150165&sprefix=battlefield+3+premium%2Caps%2C79&sr=8-2
Or if you need the full game plus DLC, you can get the full BF3 + Premium for $9.99:
https://www.amazon.com/Battlefield-Premium-Online-Game-Code/dp/B0098QPPL6/ref=sr_1_1?crid=1MHI9OWZMHF8B&keywords=battlefield+3+premium&qid=1658150165&sprefix=battlefield+3+premium%2Caps%2C79&sr=8-1
Yeah that most likely won't work. It's a pc download. Amazon is selling for $30 instead of the $50 that they ridiculously charge in the store.
http://www.amazon.com/Battlefield-Premium-Service-Online-Game/dp/B0087STJLS
Edit: $40 not $30.
Also, worst comes to worst; they sell it on amazon for cheaper than PS store. http://www.amazon.com/Battlefield-Premium-Service-Online-Game/dp/B0087STJLS
The vanilla game With classics like Operation metro
Battlefield Premium Only a upgrade for the basegame, DON"T get it if you don't own BF3 vanilla
Premium edition If you don't have the basegame