I think the only way is to restore your iPod from the backup. Leawo iOS Data Recovery
will help you know how to restore iPod touch without iTunes. This software is used for recovering deleted files from iOS devices, extracting data from iTunes and iCloud backups, so it is useful for recovering deleted files from iPod touch. The following guidance will show you how to restore iPod touch without iTunes, and you can free download Leawo iOS Data Recovery and have a try. Download Leawo iOS Data Recovery ' Leawo iOS Data Recovery for Mac
and install it.
Step 1. Run Leawo iOS Data Recovery and choose Recover from iOS Device.
Step 2. Connect iPod touch to computer with USB and click the Start button.
Step 3. The program will scan your iPod touch. After the scan, check the files you need and click Recover.
Step 4. Click Open in the pop-up dialog to choose a target folder on your computer to save the files. Then click Go to start restoring iPod touch without iTunes.
For more detail, check: For more detail, check: How to Restore iPod touch without iTunes