u/cat1uver

(I am a beginner I know it's not great)

I don't think I used enough solder or didn't heat it properly or something.. but anyways I put it in the vice to drill a whole in the back and squeezed it too tight and now I have a pretty big gap in the bezel and backing. I keep trying to get some more solder in there but it won't flow. I don't have any way of sanding down the thin surfaces in the gap so I'm wondering if there's anything I can do.

I'm clamping it down while I solder but that doesn't seem to be doing the trick. Is there anything I can do or is she a goner?