Are you sure you're old enough to play gta5?
Your misunderstanding of the questions you have been asked suggests a level of immaturity.
Which online retailer did you order the game from, if indeed you did order a physical copy?
Or
If you BOUGHT the game from the PlayStation store, then did you start the download? If not, then scroll across to your library, find the game, and press the down arrow to start the game downloading.