We sincerely apologize for this inconvenience.
Transaction information on AppStore is handled by Apple and we are thus unable to access and cancel your transaction.
If you would like to cancel your transaction, you can do so through iTunes.
Please refer to the following link on how to cancel the transaction.
Email your refund request to AppStore through this link. Please go to the link.
2) When the entry form comes up, select the Contact iTunes Support.
Select the appropriate topic then select the Email option.
Fill in your question along with any details on the error or your situation.
3) Click 'Submit' and you're done.