Getcontact Premium Refund Has Not Arrived After Cancellation

I accidentally purchased a Premium subscription to the Getcontact app, but I canceled the subscription within approximately five minutes. Then, on September 16, I received an email at my Gmail address stating that a payment of $1 for the Getcontact Premium purchase had been processed and that the amount would be refunded to the payment method I used for the purchase.

However, even though 3–4 days have passed, I still have not received the refund in my bank account or seen it reflected in my card transactions. I made the subscription purchase through Google Play on my Android device and submitted a refund request, but I still have not received the refund.

I request that the $1 payment for this accidentally purchased and immediately canceled subscription be fully refunded to the payment method I used as soon as possible, as stated in the email.