personal items flaunted around

I needed to return bra's that I got as a gift. I had the tag but no slip. I went to Jet Zevenwacht mall. The cashier Zodwa advised that I can take new bra's , when I brought the new bra's to the counter the manager Janine was looking at the bra's and told kept it up in the air flaunting the bra's around and there was other customers around, she was saying look how the bra's looks , i told her it was a gift and the white on the bra's is roll-on because I wear roll on every day and then she spoke loudly saying I cannot exchange these bra's I need a slip ect. I told her i explained to the cashier that it was a gift and she insisted I need a slip thus again looking at the bra's and pulling her face and not dealing with underwear in a discreet manner , mind you there was men standing around too. I was so embarrassed by a store managers actions and not dealing with the matter discreetly in store and flaunting my bra's around. I want this escalated and dealt with by the store manager as this unacceptable behavior from the staff member and I want these bra's exchanged. how can wire come out of a bra less than a month old. clearly jet managers needs to go for training on how to handle personal items in a discreet manner.