I've experienced worse and not at a Walmart, but in a grocery store in Germany, where sales clerks know NO CUSTOMER SERVICE AT ALL!
I was in a grocery store, got my groceries, headed to my car and as I was placing my groceries in the back of my car, I always check the milk bottles to make sure the caps are tightly closed to avoid leakage. The last thing I want is a car smelling of sour milk *yuck* I noticed on one of the milk bottles (glass) the cap would not tighten, the more I turned would result in it popping back open. Worn threads? Anyway, so I headed back in with that bottle of milk, went up to the customer service counter and told the lady that I needed to exchange this bottle for another one because it wouldn't shut tight. Her response? "Oh, but you can't do that!" Boy was I fuming inside. I took the bottle, slammed it down on the counter and said to her, "Wanna bet?" I marched back, got myself a new one, walked out of the store and nobody said a thing.
LINDA
P.S. I'll take a long waiting line anytime over something like this episode. GRRRR!