I think if you order from this website, you'll be wasting a lot of money on something that was made very very cheaply, & that won't look much like the picture. It's essentially a high mark-up drop-shipping site, & you'll struggle to return it & get a refund. Which is probably why Vinted is full of their dresses ... & yes, it offers no coverage.
It's available on other sites, including Etsy - & Ali Baba for £77 (& that's probably about a £70 mark-up!).
I'd save your money & find something properly fabulous for your £250 - you're just getting sucked in by several strings of beaded fringing stitched together, & a very doctored photo ...
https://www.alibaba.com/product-detail/Novance-Y2586-K-Women-Clothes-Wholesale_1601256384920.html