ok, my thing is, do you love your kitten????? Regardless of it's actual Generation signifier, do you love your kitten??? If you do, call it all good and move on. My cats are worth more than my car, I have over 15K invested in my cats!!!! Never ever would I even consider sending them back or asking fur a kick back.
Don't really matter what it really is, it's one of my kids.!!! Sure, you purchased from an unreliable shyster, but, do you love your kitty??? If so, count your blessings, and have the vet take care of any illness. Next time, and likely there will be a next time, adopt a kitten from one of the fine breeders from this site.!!! Can't go wrong with any of the fine established breeders that are also members here.