2/$20 Beautiful Maxi dress

I love this dress! - chest area is fitted - bottom has a flowy long pattern skirt, with a black short layer underneath The dress says size medium, but the chest area doesn't have a lot of give. It easily fits a size small and someone a size medium could wear if they didn't have a large chest. the seam has come undone in a spot on the very bottom, in the back of the dress (please seem last photo)