Because Youper doesn’t have access to the Apple billing management system we're unable to assist with granting refunds on purchases made through the Apple Stores. Refunds are done through the Apple Store.
You can follow these instructions to start the refund process on the stores:
iOS: https://support.apple.com/en-us/HT204084
Android: https://support.google.com/googleplay/answer/7205930
Itunes - Right of cancellation
If you choose to cancel your order, you may do so within 14 days from when you received your receipt without giving any reason. To cancel your order, you must inform us of your decision. To ensure immediate processing we recommend you use Report a Problem to cancel all items with the exception of Apple Music, iTunes Match, Season Pass, Multi-Pass, and unredeemed iTunes Gifts purchased directly from Apple. The excepted items can be cancelled by contacting iTunes Support. You also have the right to inform us using the model cancellation form below or by making any other clear statement. If you use Report a Problem we will communicate acknowledgement of receipt of your cancellation to you without delay.
To meet the cancellation deadline, you must send your communication of cancellation before the 14- day period has expired.
Effects of cancellation
We will reimburse you no later than 14 days from the day on which we receive your cancellation notice. We will use the same means of payment as you used for the transaction, and you will not incur any fees for such reimbursement.
Exception to the right of cancellation
You cannot cancel your order for the supply of Content if the delivery has started upon your request and acknowledgement that you thereby lose your cancellation right.
Source: https://www.apple.com/legal/internet-services/itunes/uk/rightofwithdrawal-uk.pdf
If you have any further problems, please contact us.