Bests & Worsts Reviews from Amazon

Based on some of the reviews and the sizing chart, I decided to size up. I'm normally an XL/1X (size 16 dress) but I bought the XXL. I was literally swimming in the dress. The bust drooped down and was baggy and the sleeves kept slipping off my shoulders. The fabric was very pretty and felt very light and airy though. I would have exchanged it for a different size if the seller didn't demand that I pay return shipping. Even though the order was fulfilled by Amazon and it said it was free to return the dress, the seller says that, "Only product(s) that say that they are eligible for Free Returns on the product detail page are eligible for Free Returns. Free Returns only applies to product(s) fulfilled by Amazon. It does not apply to the same product(s) fulfilled by other sellers. Your order is fulfilled by seller not Amazon. So it is not free return. May you can understand." I had to pay $6 to ship this back, which seems like a petty thing to get annoyed with but the only reason I bought this dress over another dress I found was because I thought I could exchange it / ship it back for free. Highly disappointed.