Maggie Sottero Monalisa Royale Fall unclassified dresses

Purchased this dress unfortunately it does not fit properly. From manufacturer:One-piece, corset, strapless, full A-line gown with sweetheart neckline. The gown features regal embellished embroidery accented with Swarovski crystals, bugle beads, seed beads, glass beads, and sequins. Embellishments ornament the bodice and center front skirt panel. The caught-up cutaway skirt is richly decorated with motifs that also accent the caught up skirt back. The embellished chapel length train finishes the style. A very stunning gown! It has been bustled and has bra cups sewn in