One thing you might want to try is a screenshot of the QR code on your phone, a physically printed version, and also try the barcode version. 
But the one Petro Canada card that I got, it was c...
I tried the QR code and the bar code, either of them didn’t work. Thought about printing it off, but ink is pricey.
This should be fairly straightforward, but I guess this is a common problem
This should be fairly straightforward, but I guess this is a common problem