Suspicious Sproetjies online retail shop!

I had ordered a beautiful dress, paid R490. When the package arrived everything looked fine... That was Monday. On Wednesday I put it on to wear to a function. It's a wrap dress and so when I sat down at the event I realized it had a cigarette burn and looked like someone had ironed it. When I messaged her/him the owner she was very rude. Told me she checks everything and practically called me a ****. She told me she will not get into an argument because it wasn't her. I am extremely unhappy. Told her I will take to my social media