You should have not been treated that way--ever. If you call 1-800-wal-mart and tell them, it is my best guess there will be disiplinary action taken--quickly.
I worked at our Wal-Mart for 14 years, and yes, it does get worse as far as customer service. When Sam Walton was alive, things were soooooooo much different. He would not have tolerated that type of behavior from his people--for a minute. The co. now doesn't think sales people on the floor are important. They think since it is a self-serve store, you shouldn't expect anyone to wait on you. Wrong. You did the right thing to let them know your feelings.
Mariah