Hi,
This is a common post in the Community Center. You could try visiting the reply I gave the last person or call Airbnb. If you don't know how to contact Airbnb, type into the search bar, "How to contact" and I made a How To Guide.
Good luck and please come back and let us know how you fixed it so we can reply appropriately to others who are having the same issue.
https://community.airbnb.com/t5/General-Hosting/Not-receiving-text-or-email-notifications/m-p/9835#M...Happy Hosting!
Dave
David
Superhost Ambassador ~ Host Club Community Leader ~ Community Expert ~ Experienced Co-Host