No one can help you.
You will have to look for it.
You can try calling it on facetime and see if you can hear it ring.
You will have to find it/look for it the old fashioned way, like if you lost a wallet/purse.
- Change the passwords for all accounts used on the iPod and report to police
- There is no way to prevent someone from restoring the iPod (it erases it) using it.
- Apple will do nothing