Originally Posted by
NinjaKitten
I hear you with taking it back, I just don't want to be a D**K about it. ......
I don't think you need to worry about that.
However, it's a new bike, and the creak wasn't on the spec sheet, so after they joke about not charging you for it, it's their problem to fix and deliver a working -- non-creaking -- bike.
You should be nice about it, but firm because it's their problem and they shouldn't make it yours.