lease be reminded of the following before upgrading to the PlayStation®4 version:

Upgrading should not be confused with registering a PlayStation®4 license in addition to the PlayStation®3 version. After upgrading, you will no longer be able to access FINAL FANTASY XIV: A Realm Reborn using your PlayStation®3.
Upon completing the upgrade process, a PlayStation®4 system will be required to play FINAL FANTASY XIV: A Realm Reborn.
Please note that after completion, the upgrade process cannot be undone.
Users must first register the PlayStation®3 version to their FINAL FANTASY XIV service account before upgrading.
All FINAL FANTASY XIV service account data including characters and in-game items will be carried over upon upgrading to the PlayStation®4 version.
* Users will also have the option to transfer macro and hotbar settings from the PlayStation®3 version.
(http://sqex.to/Yee)
Users who wish to play using both the PlayStation®3 and PlayStation®4 are required to purchase the PlayStation®4 version separately.

Please proceed to the FINAL FANTASY XIV: Mog Station to begin the upgrade process.
(http://sqex.to/Msp)
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Quick questions, did you keep the old beta phase 2 download, or did you not participate in that? You should be able to login using that application and sign in just fine.
You did not need to redeem anything, if you already had the PS3 version which is why you would upgrade.