Flroal Wrap Front Sleeveless Cocktail Dress

Initially purchased this dress in the store in a size 6. Tried it on at home again and the top looked way too big. Returned it and purchased a size 4 online. The top was still too wide with excess material. Alterations were unable to fix it because of the way the collar was attached to the shoulder. I was told the cost to take it apart and try to remedy it would be too expensive. I was so disappointed because it is a beautiful dress and I was looking forward to wearing it to a wedding this spring.