HDFC Bank — debit card - double payment

I recently purchased a product on amazon. Ae, on july 5th, 2020 using my hdfc debit card for 2709.99 uae dirhams. The amount was debited and i also received the product on july 6th, 2020. But on july 10th, 2020, there was a transaction happend for same amount without my knowledge. I did not get any sms or otp for that. I have also reported this issue to amazon. Ae. They wanted me to check with the bank, stating that they did not initiate that transaction. I want this to be resolved and refunded asap.