Not very clear what happened, you typed the post in the title which has a character limit. You saved your photos in Google Photo then reset your phone correct? Did you check to make sure they all were there online? What do you mean "after you reset my photos", what did you do? If you copy the photos to the cloud storage, they will be there unless you had them synced to a device and deleted them off the device.
You need to edit your post and put in what you did and what happened.