How can I get a refund if I paid through the Apple App Store?
Since the purchase was made directly through Apple, refund requests will need to be made through Apple as well. We are very limited in what we can do with Apple purchases as they are ones who have your purchase and payment information. They do not let any third-party apps (ie. SwingU) handle any refunds or transactions, it all has to be done by them.
The good news is that they are really good about getting back to customers and resolving issues. You can find the contact information on their support website.