I'm sorry to hear about the order being canceled and the rewards not being credited back. I request you to private message us the cancelled order number so that I can check with our finance team on your behalf.
So, I trying to buy a gift for my niece.  They have an Xbox so I thought I would get them a few games. I wanted to purchase the software download games so they could get the gift the same day.  So, I had $88.38 in reward points, and I purchased 2 game downloads. Then after I completed the order, it had a button to do a get my download... I clicked the button, and it took me to the digital download page. I didn't see anything.  Then I went back to my order conformation to click on the link again to make sure I wasn't doing anything wrong.   My order conformation changed and said that the order was canceled???? I didn't cancel the order!  I don't know what happed? My order was canceled but I never got my $88.38 of rewards points back.  
Order Canceled...