No customer service and poor attitude from staff

This is the 3rd bad expereince I have had a Builders Warehouse. I went in yesterday to the Alberton Branch and went to buy plants, there was a section of plants in poor condition marked down. When I got to the counter, the manager said we cant discount these the system doesn't allow us to so too bad you cant buy them. I walked out of Builders without purchasing anything as there is no customer service.