macOS Sierra is more than just a name change, and the third public beta of version 10.12.4 is now available. If you want to try it out, you'll need to sign up, enroll your Mac, download Sierra, and install it.
Update: According to KGI's Ming-Chi Kuo, the iPhone 8 will sport a new front-facing FaceTime camera and infrared component that will allow the iPhone to sense the three-dimensional space in front of it.
If you experience a problem with music, movies, TV shows, books, or apps you purchase from iTunes or the App Store you can request a refund directly from Apple. You'll need to have a valid reason for the request—it's not meant to be a way to get free trials or short term use—and it can take some time to process, but it is there to help make sure you get what you pay for and don't end up paying for anything you didn't want.