Tidebuy Poor customer service , wrong sized dresses, poor quality products Fujain China

We purchased two dresses. First one the sequence falling apart and like 3 to 4 sizes too small. Second dress supposed to be size 16, poor quality and fits my size 12 daughter from the bottom but too big from top.
I emailed images of dress, measurement to prove to thier tailor that it's small and measure tape on dress plus more images of my daughter wearing the really small dress. They won't budge for an exchange.
Now I'm stuck with two useless dresses.

I want either a refund or exchange on both. I'm not asking for something impossible or irrational. Don't buy from them.  They respond cluelessly to your email. They disregard anything you say and like have a script they follow for all emails.