No i didn't say i have a jailbroken device, that is not necessary.
Open up Your Account in iTunes
Go to the iTunes Store and check your account. It's in the top right corner.
Check Your Purchase History
Once you're logged in, click 'See All>' under Purchase History
Report a Problem
Scroll down until you see the big button that says 'Report a Problem'. Click that big button.
Select the App
Find the app you want a refund for and select 'Report a Problem'
Explain
Apple lists these six categories for your app-related complaints:
I didn't receive this application
I inadvertently purchased this application
This application does not function as expected
This application is not compatible with my device
I have another purchase or download-relation question
Choose the problem and explain your situation, they will send an email to Supercell.