Walmart Personal Shopper interview questions

I put in an application in October 2019 stating I could only work weekends. Since school is going to be out I changed my availability to open on March 29, 2020, for every single day. I got a call the next day to come in for an interview. I waited about 10 minutes for a 30-second interview. She just told me that she didn't have any availability for me. I honestly think she could've looked at my application and told me that over the phone instead of wasting my time! But hey, its Walmart I expected nothing more. Everyone knows Walmart is forever on their BS!