by trying even once with the cazy glue you've probably ruined any chance of repair. the restoration, or a different type of restoration, will need to be re-made if the tooth itself is still in good shape. krazy glue, or any other non dental adhesive, is not made for dental issues and is not appropriate for the mouth.
Can't help you there, you need to get to the dentist to repair or more likely remake the veneer. Veneers are very difficult to repair once fractured. Good luck.