I believe there was something on the lodestone about this, though the title was misleading as it only mentioned Windows (PC) version, but it includes details of what to do for those that have preordered the physical PS4 version. I can't confirm for you if this will work as I'm playing on PS3 and thus have an entire extra can of worms to be stressed over, but regardless I hope the link I've provided below helps.
Entry on the Lodestone: http://eu.finalfantasyxiv.com/lodest...7f345084337196
Whilst I am not amused at how the Heavensward download for EU PSN is being handled, I'll wait a bit longer before unleashing the full extent of my frustration as I would like to hope at least that things are better than they seem until we have evidence (or lack thereof) to prove otherwise.
