Disrespectful shop assistant

I had a bad experience at Levi's Hilfox crossing on Sunday the 27th of November. I went for the black Friday special. As I and my daughter were in the fitting room my aunt was watching my 6 yrs old son but the busy body that he is he ran to the fitting room while my aunt was not watching. While in the passage he placed his fingers in one of the doors unfortunately someone went in and closed the door accidentally pressing on his fingers. I jumped out as soon as I heard him scream the lady inside opened. He was given 1st aid in the store. What I didn't not like and felt belittled and disrespected was one of the shop assistant response and attitude regarding the situation. She shouted at I and my aunt and told us how irresponsible we are for Leaving a child unattended. I was told to leave the store in a harsh manner, while trying to give my aunt and daughter my bank card so they can stay behind and pay I was told that is not important I must leave the store. I understand that your staff must care for the customers however I do not think that is how it is done.