How to repair caved-in nose bridge from dermaroller? (Photos)

a few years ago, I used a 1.0mm dermaroller to help get rid of a small scar on the nose. I only did it once, however, 3 years later, i still have a rectangular cave in section on my nose bridge that is disfiguring. My nose is no longer straight and is instead slanted , as if someone took a sandpaper and sanded off one side of my nose bridge. Is there any treatment that can help this? Also is injecting something like rejuran an option there?