Another Job lost

"Okay Kaaren you can step into the locker room and change and when you're ready come out on the sales floor and I'll show you around"
"So this is the uniform then?"
"No, you'll need to have the matching pants...we don't have your size right now so we'll just go with the shirt for now."
That's what he said and that's what I did and I still got fired!!! Why does this keep happening to me?!?!?!?!?