Trisha Embellished Jumpsuit- Black

The Trisha Embellished Jumpsuit (Black) sold on Fashion Nova. I bought a 2X following their size guide but when I received the item it is actually two sizes smaller than that. And it doesn't stretch at all. I was barely able to get it up in the seat when I tried to try it on. So this is a warning: if you have hips, thighs, and a bottom you're probably not going to be able to wear this either. The material is really nice. The item is very nicely made. I just can't fit it. I've included screenshots of the model wearing it on their site as well as their size guide. The item is brand new barely tried on, with the tag still attached. But once again though it is marked as a 2X it runs really small.