Sorry you encountered somebody like that
People like that get me a bit miffed. From where I stand (or sit, rather) that type of behavior was crude, dishonest, and extremely unprofessional.
There are, unfortunately, too many people like that.
I'm glad you at least like your bird.
More a credit to you being a responsible caretaker who takes time to appreciate your birds
(Not all birds are easy to appreciate.)
Edit to add - curiosity got the best of me and I looked them up (just to look/read. Not interact) and I don't know if they modified their listing, but there is "satin" hidden in some pictures and description.
That being said. As somebody who isn't part of the Silkie community, but has considered adding some, people generally like silkies because they're known for silked feathers... If somebody wanted a Golden Retriever, they wouldn't get a doodle... If I'm getting a silkie, it's because it's the only source available to me with the silked feather gene...