Same app paid for twice due to some error on Google Play Store, no receipt of failed transaction, but money deducted I purchased a game yesterday, however due to some issue the purchase failed, yet the amount was deducted. I contacted the bank and they registered my complaint and informed me that either I'll receive the money back or the merchant will. Being impatient I purchased the same game later, but my previous transaction was also sent to the merchant, which I found out when I enquired the status of my complaint with the bank. Now I have no idea how to resolve this, I have not received any receipt for the previous transaction as well.
As updated by OP the first payment has been cancelled after verifying in the payments Center
Since the payment had been honoured by the bank prior to the cancellation (likely), you can contact Google and talk to them and request for a refund (or from the Google Play Settings &rarr; Help and feedback)
Typical refund requests time line here