How I can change age in dragon city? I tried to delete game and data and again install it but doesn't work (IOS). I have acc on FB with 40lvl, but I'can't connect because I set 16 year.
How can I contact support team?

You can contact support via the in game support system however if 16 is your correct age they will not help you "lie" to change this. But I do recommend you contact them, another player reported they helped to resolve this issue for him, though his was an error in putting in the wrong age. FYI this is a fb issue so you should check to ensure your age/date of birth matches there.