We have been advised that the axle on our camper is bent.... Heartland and Lippert will not help us out... Just upsetting....
Warranty is about manufacturing defects, and there are different kinds of bent axles.
If 'bent' means it no longer has an arch, that could be a manufacturing defect. Lippert and Dexter warrant their axles and both have in the past helped on that type of problem, even after the warranty has expired. If that's your situation, you might call Lippert back and discuss it again.
But there's also the situation where 'bent' means one end is bent. That's not typically a manufacturing defect, but rather is likely to have been from hitting a curb, or perhaps a bad road/bridge joint, or some other road hazard.