I've only called and emailed the corporate of Wal-Mart for our fish section once. ALL the freshwater tanks were infested with Ick so badly that you could barely tell the color of the fish they were so spotted and white. I was so upset, there were dead fish laying everywhere, it was horrible. Not only that but they were SELLING these animals that were sick and contagious. I got several phone calls and the assurance it would be taken care of, checked a week later and most of the fish looked better, they actually treated them and cleaned all the tanks. Actually paid someone over time to come in on their day off to do it fast, which Wal-Mart NEVER does, it was that bad.
I won't open a new container but I will rummage in the cabinets and find food and do water changes for the bettas and hide the dead ones so kids don't see them in the sink, but always have a Wal-Mart employee standing there while I do it. :P