Try This:
I've got the cure for the Motorola G7 play probably will work on other versions of android as well on any phone.
1.Configuraciones
2. apps and notifications
3. See all apps
4. Tap the 3 dots menu upper right corner
5. Tap show system
6. tap phone services
7. tap notifications
8. Turn off alerts
Goodbye notifications on the temporarily turned off by your carrier crap.
You're very welcome!