How can I get a refund if I paid through iTunes?
We are very limited on what we can do with iTunes. They keep a very tight watch on their money.
Because it was made through iTunes you are going to have to contact them directly. 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 email them at firstname.lastname@example.org.