Is the screen completely useless or can I fix it?

So a few weeks ago my iPod was thrown across the room by a toddler and it was in a case well I checked and everything seemed to be fine until I looked at the top and the back of the aluminum case was completely bent away from the glass. The glass isn't cracked or chipped or broken but I did manage to bend the aluminum back into place. The screen has a few lines running vertical on the left side and where they run the touch screen doesn't work well--it's very touch and go. Now I can use it sometimes but it's picky when it decides to actually work. Does it seem like I should buy a whole new screen or is it more likely some of my cables came undone?