How do you photograph a display of packaged food?

The case comes in as context for the pack, and the listing stays the front of the package. If the shelf hides the label, it works neither for the listing nor for the wholesaler. Set one unit in front, label facing, and the rest of the shelf behind. In Madrid the whole fridge is photographed and not one label reads. The pack comes out in front, readable, and the case is only background if it does not cover the text.