I have a suggestion that worked for me. A couple of years ago there were many negative remarks about a certain chain store on this forum. I always got good service from them and got to know one of the sales person via phone somewhat well. When I placed my next order I casually mentioned the negative remarks from the site and suggested she read them. She told management about it and they did. several weeks later I read on this site how much improvement was made in their service. Ikinda like to think my "mentioning " of it helped. Maybe that's what you should do with Walmart too. It might work.