Unhelpful

I'm so irritated I went to exect on the 23rd of December 2018 and I purchase some things and then I later went again around the 28th to purchase some more things now one of the dresses that I purchased on the 28th of December 2018 does not fit me very well so when I went there to exchange the dress only to find out that I took the wrong slip the lady that was assisting me was so unhelpful and rude she didn't even ask me if I ever made any previous purchases and then she took my dress indirectly accused me of *****ing and said that if I wanted my dress back I have to bring the proof of purchase she didn't even wanna hear my side of the story and told me that I never purchase that dress she was so ********* and unhelpful she didn't even try and find a solution for me I had my gift card with me that I made this purchase with nor did she try and find the slip for me at head office or something I want my dress I want an apology I want this sorted out.that is exact at Boitekong Mall.