Hi there ZhSayat,
Thank you for seeking support using the Apple Support Communities. It's my understanding that your refund was approved by our iTunes Support team, but you have not seen this reflected onto your payment method. I can help.
When your refund request is approved, the funds are returned to the payment method that was originally used for the purchase. It may take a few days for the refund to become available on your original payment method. Should you run into any additional concerns, please reach back out to our iTunes Store Support team so they can review your refund further: Contact - Official Apple Support.
Thank you for using the Apple Support Communities!
Take care.