so SO SO SO ANGRY

Yesterday one of my father's customer went to the photocopy shop that i work at...he is so rude...he told something bad about my dad in front of me and the worst, in front my dad... he insult my dad...he merosakkan my dad reputation...i am so angry.... he is the one who wrong, NOT MY DAD .... but he tolf something different in front of my bos .... he is so evil .... he is a well-educated person... he shouldn't do such kind of things... he should become the role model of others...BUT, he had done something that is so opposite from the characteristics that someone who have the same occupation with him...