I swapped shifts with a coworker today and I wasn't informed that it was approved. I was mad when I showed up to work today not realizing that shifts were swapped and I didn't have to work today. I had just clocked in when a floor supervisor told me that I didn't work today so I clocked out and left. Me and the coworker wrote down our names, dates, and times on a pamphlet for the shift swap. I tried calling my supervisor today to see if shift swap was approved, but he thought I did it today, so my grandma had to talk to them. But still, I wasn't informed, called, or told anything until I went up to the store to find out. Kroger made me frustrated today.