The ornate I have liked playing in the bubbles from an airstone, which made it look like she was floating or bobbing for air. First night I found her on her back gasping, ended up being that she was just sleeping funny. A few days later she found the sand and has been going in at night ever since.
hopefully with little improvements daily your fish will make it and be normal by the end of the week. I doubt they sent you a visibly sick fish so I wouldn't rush to put in meds yet, it's just getting use to the tank.
So how much was the total for a kuiters? You had to pay shipping for the replacements right?