Recovery

If you were syncing the data with iCloud and deleted it from the Recently Deleted album, the data is gone. If you were't syncing with iCloud, as Allan posted, restore from your backup.

Restoring from a backup erases all data currently on your device. Any data newer than when the backup was made will be erased. A restore is an all or nothing restore.

Backup - Restore your device from an iCloud or iTunes backup

Check the Photos app and at iCloud.com/Photos using a computer browser for a Recently Deleted album.

Restore backup

I deleted all my photos, videos and notes (including the ones in the Recently Deleted folder) is there any way to retrieve them? It was approx 2.5gb of data but my iCloud backup from the day before shows 57.6mb... will this work?