Embarrased by Employer

I went to Mr price Silverton in Pretoria yesterday, I found this gorgeous white shirt that I really loved only to find out that they ran out of stock on my size, the kind supervisor called the Mamelodi branch to ask if there are any sizes there and they said they had by then the Mamelodi branch said in 30 minutes they will be closing the store so I drove as fast as I could so I could make it in time when I got there they only had one size left and only white colour, I went to the fitting room to fit it only to be embarrassed by a staff member by the fitting room called Kenneth, he yelled at my in front of customers saying how stupid am I because its obvious I cant fit a white shirt, I tried to explain to him that there isn't other colours and I came all the way from Silverton to purchase this shirt and I cant go home without fitting it first he kept on screaming at me and saying its not his problem and besides its Sunday and they want to go home so I should leave the store, I told him am going to report him for this and he said he doesn't care, As a faithful customer of Mr price I feel that I have treated very badly and he embarrassed this shouldn't be left unresolved