Top screen?
It is absurdly difficult to work on 3DS series top screens. I repair handhelds, and I don't know anybody who voluntarily works on top screens.
The problem is the hinge. Even if you do everything right, those ribbon cables will tear on the hinge if you even look at them wrong. And the ribbon cables are permanently attached to the screens, so if you tear the cable you've ruined the whole screen.
Since you've tried the repair yourself, you know how difficult it is.
Sadly, you're unlikely to find anyone reputable to do the work.