Twist front tankini

Twist Front Plus Size Tankini Set in Black, tag says Size 4xl but fits like xl. Brand new in bag with tags. Tried on top only and it is way to small. Fits more like a XL. Would fit a size 16/18 or 20 with small bust. Suit is from China thus making it much smaller than USA sizing. Please see size chart in last picture. Company does not take returns.