What to do about weak wi-fi reception iPod Touch 4th gen?

I recently broke my Ipod touch 4th gen by dropping it from a height accidentally. The screen is totally shattered, but the wi-fi receptor also seems to be damaged. I still can pick up wi-fi signals, but weaker than I usually get. I'm wondering how this can be fixed, where it can be fixed, and who will fix it. I'd also like to know price.