If you got the PS3 version you should have gotten 12-digit codes. 18-digit codes are for the PC version.
Edit: Also, Early Access codes are no longer valid as the early access period ended at 11:59 PM PDT August 29th. If you want to continue playing you need to use the code that actually came with your game. If you got a physical copy of the PS3 version there should be a PSN code on the back of the manual. Just enter that, you don't need to do the download. Then the next time you try to log in you'll be able to apply the regular game registration to your account.
You don't need to redownload it, just exit the PSN when it takes you to the download list.