Finally how do I delete these images…
You can’t delete the images purchased by customers you can only delete them by modifying the database.
The galleries get assigned by you, these are galleries that only the customer can access and that way you don’t have to send them a separate login for each gallery.
If I delete the gallery from the image store …
If you delete the image store completely it will remove all galleries but not customers you may have to change user roles
Deleting the user will remove all data associated with the user.