I’m sorry you’re having difficulty and I’m not trying to frighten you. I’m not an expert either, so keep that in mind, but I do have soldering and electronics experience/skills from my other hobbies. I would guess as well that the issue is being cause by the damage to the PCB (circuit board).
It’s hard to tell, because I can’t see where those traces (the etched lines in the PCB) go and what they’re connecting. Not all traces are always used, but there’s a good (more than likely) chance they are. I can’t judge from the picture, but depending on how deep you gouged into the board you’ve likely broken the traces which indeed is very bad.
It is possible to repair broken traces, but that’s very much something for experienced professionals to do. There’s various methods to do it, but I would not recommend trying it yourself. If I was in your position, I’d stop now before possibly causing any further damage and seek professional assistance.
I don’t know where you’re located or how much it’ll cost… never had to do this myself other than knowing it can be done. You can search in your area/country, but here’s one example: http://www.circuitrework.com/
Hopefully this turns out OK for you!