To find playlists you've deleted go here to restore them. Unfortunately, I don't think you'll be able to find Unstarred songs, but you could try to contact support for that.
Like social media? Shoot them a Direct Message on Twitter @SpotifyCares with your Spotify Username and Problem. Or use this Form at https://support.spotify.com/contact-spotify-support/. If you get an automatic response, just reply back to it and you'll someone help you in no time.