The refunds are processed at the merchant's end. Cashfree is a payments platform that helps businesses accept payments. If the merchant has initiated the refund, you would have got a 'refund initiated' mail from Cashfree and can expect the amount to be credited to your account within 5 to 7 days of the date the email was received.
If you have not received any refund initiated email, we would suggest that you contact the merchant.
If the merchant is not responsive, you can report the issue here.