Mermaid Wedding Dress with Slit

I am wearing a size 2 in the photos, but I bought a size 4. Never worn, new with tags. No alterations have been done to the dress. It comes in a protective bag. The butt looks bunched because the dress I tried on is too small for me. I bought it but my dad’s gf said the slit is too high, so I don’t feel comfortable wearing the dress anymore and I bought a new one to wear for my wedding instead. I’m 5’3, 130lbs.