You have tried super glue? Then there will be some remains of glue on your lenses. They must look ugly. Why not buy a pair of new sunglasses. I know some sunglasses are very expensive. But they won't break that easy. So if we take care of them. They can last for a few years.
You must glue them from inside as well as the outside. I don't know how to handle this. But some people can do that. And there are videos and articles that people share their experience of fix their broken sunglasses. You can have a look on the internet. You can definitely find some of them. Good luck!