Why are you upset?  Why are you angry?  You can blame it on another all you like, but
look to ego as the culprit when the blood boils.  Were it not for ego, you would not experience
upset.  Take a few deep breaths to calm
down.  Now write down the reasons why you
believe the other has done you a disservice. 
Perhaps there are valid reasons; perhaps not.  It does not matter.  If you are reacting with anger or indignation,
this is very much a human reaction.

What would spirit
say?  You already know the answer.  Thank you for asking.