What type of scar do I have and what is the best treatment option? (photos)

I have a scar in my glabella that is causing a crease due to depression. I was wondering if there's any treatment options that would help plump up the depressed skin and smoothen out the area. I'm also struggling to identify the type of scar that it is (rolling or boxcar) which could help my narrow my treatment options. Any help would be greatly appreciated, thanks.