Game apps downloading without permission
Game apps are downloading to my iPhone 4S without my permission - I think most of these are 'Absolutist' games (Candy Crush Saga, Scramble Words Free, Gems with Friends Free, etc.) - it's been going on for about 3 weeks now, with a new game magically appearing on my phone about every few days or so. How is this happening? And more importantly, how do I make it stop?!
iPhone 4S, iOS 5