Consult local regulatory agencies in your area
If you feel your supermarket is not limiting exposure and promotion of alcohol to a single area(s), consult your local regulatory agencies. As a starting point, contact your local PUBLIC HEALTH UNIT.
You may also contact the licensing team of the local council in your area as they deal with Local Alcohol Policies or Licence Applications. Here is a list of LOCAL COUNCIL whereby you may search for contact details of the respective alcohol licensing team in your area.