Spar has a dress code to shop now

I got a bad treatment at spar in Lusikisiki in the eastern cape Silver Oak. The store wanted my 12 year old daughter to stand outside the shop and wait for me just because she was wearing her Gown. We have been travelling this morning at around 7 from KZN to eastern Cape. She just happen to be on her periods and needed to get her sanitary towels and other things. The only thing we could find is her gown so she can change and hide the mess. If the store manager was reported to the matter would have understood rather than every staff and security traying to manhandle my daughter who is already in trauma as her mother is not with me. To cut a matter short what your wearing matters what. The best they could have done as we are visitors here is to say please note there are rules that in this store it matters how you dress before you can shop.