Unfortunately there is no way to retrieve deleted media from Google
Photos. However you can check to see if you have any other backup
programs downloaded that may still have your media. There are several
apps that are in the Google Playstore that have this capability. Also,
sometimes your cellular provider offers some type of backup that you may
not realize is backing up media. I am sorry your media got deleted, but
I hope one of these options works out positively for you.