There are three steps when you pay, and in the third step there will be an note here:
"You have accumulated ... CB points. What's this? Redeem". Please see the following picture:
If you want to exchange your points please click the button "Redeem" and you will get the total price you need to pay after exchanging, then "Confirm the Order".
Any other questions please feel free to contact us on http://help.CigaBuy.com/contact-us.
Have a nice day!