I've taken the trouble to 'demand/request' to see a 'manager' [they wear suits] at my local Tesco and asked why they've dropped items that I purchase from their shelves ? I'm referring to small low value items ... after a while the items have reappeared on the shelves ... adding "I only come here because you stocked XXXX and now that you no longer stock it I'll go to Sainsbury/Asda ' seems to invoke a response.
The stores only exist to satisfy customers ... no customers .. no stores!