Yep! So long as the order was not delivered, you will get your points back.

How do you cancel !!?

You can cancel your order by going to your profile picture in the upper right corner, clicking orders history in the drop down menu, and clicking cancel order on the order you want to have cancelled.

Yes you can.Click the icon near your profile photo.Go the "Orders history" after that click your order whichever you want to cancel and click"Cancel Order".
Have a good day ! :)