Is it possible to straighten the sides and brim of this hat?

[SnowyViking]

Hey. I just wonder if it's possible to straighten the brim of my jaccaru hat and the sides and back aswell? It used to be like on the first picture but now the brim,back and sides are a whole other shape and so I wonder what to do. The brim has a wire in it and the hat it self is very floppy.