I get solicitors calling everyone I shop there and use my email for the reward points. Not worth it. I dont go there anymore

Theyve been telling me for four days straight that the item I want will be in tomorrow. All I want is a an empty cardboard box. I cant fathom any reason why an office supply store would be out of all of those, in various sizes, nonetheless for more than 24 hours, as thats a low velocity stock item, which can be shipped to them daily, if need be.