You must scan the QR code, click continue to attach the screenshot (it is the only proof of payment) and you can complete the purchase.
As per Hindu ritual, people with vows do ‘Dandi’, where they pay homage to their gods by laying chest down and marking the path as they make their way toward the place of worship. Here a devotee performing the Dandi ritual dedicated to the Sun god during the Chhath festival in Kolkata.