I'm going to call a rude girl fat after wasting my time
How did she end up wasting your time?
Her attitude was out of control and she constantly confused people who didn't know each other.
What she did is not right but you should not punish her for something trivial. You don't even know why she wasted your time there might have been an emergency.
I don't care. That was a waste of my time and I want to do it again later.
Calling a girl fat just because she made a mistake is very inconsiderate. Try your best to be more understanding towards  people as everyone is going to make a mistake every now and then if they are trying hard enough.