accused, insulted and falsely accused of theft.

It was my lunchtime and I went to buy extra uniform trousers black. I was wearing a black trouser that I bought a week ago from the other branch. I took on the rail 2)trousers 1)skirt 2)blouses and to the fitting room to fit my items, I was done fitting I took a trouser and skirt with me and gave the lady a trouser and the two blouses and left to look for other things and went straight to the till point to pay. I was done paying and as I was about to leave the store, A lady at the door asked me where is the trouser you were wearing when you came to the store? I answered here it is I am wearing it. and she said you are lying, I told her that she must not insult me, because what she's saying is truly not appropriate. She answered, pointing a figure at me, you left the trouser you were wearing in the fitting and you took ours that is new and wore it, this is ours, so take it off. infront of all the other customers and I never felt so embarrassed in my life. I said to her please check your Camera's, and she said we don't have them. So i ws told to take it out andwas left naked, to prove my innocence I took them to my wrkplace so they can show them frm our Camera's and I was proved ryt.