Unlock full game minecraft ps4?

I purchased minecraft on my ps3 and recently bought a ps4, players have the ability to download it on ps4 free of charge if they already bought it on ps3 but every time i download it, it acts like a demo and asks if i want to unlock the full game, when i click unlock full game it takes me to the ps store but it says i already have it downloaded?! I checked if there are any other versions of it in the store thinking i may have accidentally dl a demo, but thats the only one, its a trial with a full game unlock i think. Either way this is so frustrating, really hope I don't need to make a double purchase, anyone found a fix?