I've tried almost everything on my occasional shaving bumps/scars, they wont go away no matter what! why?

I noticed when I started shaving often I would get shaving bumps, then I cut back on shaving, soon after I stopped and started using Nair. and I don't have the money to consider waxing every month. I've tried fading creams, cocoa er, and Shea er all with Vitamin E in them I STILL get scars no matter what I try. I try my solutions no less than a month apart that way it isn't so much stress on my skin that would make it worst what else can I possibly do? Help because it's summer time!!