Don't know the right answer for you to your question.
How is it crooked ? How/when did you find this out ? Was it noticeable before the sale or after the sale ?? Before you left the dealership or when you got home ?
I know before I bought the used MH we had , before I signed on the dotted line they did a walk through with me and everything had been operated /flushed /turned on turned off , pulled out , pushed in ,crawled on top of it and crawled underneath it and operated to my satisfaction etc etc etc....
Same goes for a new one !
Not trying to sound like an a$$
But anymore most just don't care about quality in their workmanship in building anything anymore !!!
Just pass it on to the next to cover it up until we the customer has to deal with it....
Hope you get it resolved to your satisfaction !