How to Get a Refund for a Purchased iPhone App
STEP 1. First you have to start iTunes, then click on iTunes Store.
STEP 2. Now simply Login to your iTunes account, then click on your email in the upper right corner of iTunes.
STEP 3. Now click on “Purchase History”.
STEP 4. Now choose the app you want a refund for, then Click on “Report a Problem”.
STEP 5. Now you have to fill out the form with a legitimate reason for your refund request
STEP 6. You can use Apple’s web form, if the iTunes approach fails.
STEP 7. Now simply submit the problem report and wait for a response from Apple.
You should note that generally Apple rejects the refund requests those are unreasonable. So you have to submit the form with a legitimate reason. Technical problems preventing the app from launching completely or limiting its functionality are valid claims for an app refund. In this way you can get a refund for a purchased iPhone app. [Via]