Tall kitchen drawer not straight

I have recently fitted this drawer; the carcass, drawer and drawer front are all from B&Q. As you can see in the picture the top is a lot more proud than the bottom when fully closed. I don’t see any adjustment to change the tilt. I am about to fit the end panel, but it’s only as deep as the carcass+thickness of the drawer front (57 cm) so the top of the drawer will be proud of the end panel.

Any suggestion?