How do I straighten the chassis entirely?

My aluminum chassis on my iPhone SE bent at close to a 22° Angle from the bottom side of the volume down button clear across to the top of the SIM tray, and it’s torn the bezel of the screen away from the interior of the chassis at the top of my phone, and partially at the bottom, WITHOUT breaking my screen at ALL (miraculously) and I was wanting to know if anyone knew how to bend that chassis back into shape right, or knew where I could just buy a replacement chassis? If anyone needs them, I actually have pictures of how it bent so people can see what I’m looking at, and are willing to share them as necessary