In most cases, this is simply a matter of slow delivery. If you have not immediately received your items, just wait a couple of hours and all should be okay. If nothing happens, please contact iTunes support to find out the status of your purchase and request a refund if necessary. Unfortunately, we are unable to refund your money ourselves or give you the items you have not received, as we do not handle the transactions on iOS.
Alternatively, you can ask for a refund directly from iTunes on your computer:
1. Launch iTunes and log into your account.
2. Tap on your name, then navigate to Account Info > Purchase History > See All, then select a transaction and tap "Report a problem".
3. Fill in the form and provide a valid reason for a refund.
You should receive an answer within the next 48 hours. If successful, you will generally receive a refund in 4 to 5 business days.