Hello,
As apple might not be able to help you, i can certainly help you. So you will first off need to know the password for both the ipod and the icloud account (this is just a precaution). So now if you have that follow these steps:
1. Download iTunes if you don't already have it.
2. Back up iPod
3. Disable both passcode lock and Icloud (sign out) (dont have to do this just helps the process)]
4. Plug in ipod to computer with itunes
5. Hold both the power button and the home button until you see the apple logo, then let go of the power button but continue to hold the home button.
6. Then open itunes a pop should appear and it will tell you to restore click it and your done, let apple do its thing.
7. The restore click restore back up
Any trouble search it on youtube always helps.