Refunds from Google Play are returned to the payment method used to make the original purchase. Refunds take different amounts of time depending on how you paid. Processing time can be affected by the card issuer and sometimes takes up to 10 business days. If your credit card is no longer active, refunds will go to the bank that issued your card and you will have to contact the bank to recover funds.
Refunds from Google Play are not applicable if a purchase is a year or older due to the date of purchase.
Pocket Mortys and Adult Swim Games are not able to refund your purchase directly. So hit up Google Support at https://play.google.com.