I felt humiliated the fact he was screaming on me

I went to the Engen Francis baard as I was going to Limpopo, then they stole one of my tyres closer when I went back to inquire there was an old man who I was told he was the supervisor, He was very rude he told me to come to him because he will come to me,i went to him then he started shouting, the question is this how you treat your customers