Hello @Muhammad284
As a host myself, my preferred communication is via the Airbnb message system which is easily accessible either via your phone with the app or on your computer. We are notified by Airbnb that we have a message from our guest by several means, SMS, email etc so it's really difficult not to miss!
If that doesn't work then I would suggest contacting Airbnb customer service who will try their end but I can quite understand that this lack of response is worrying but hopefully it's just that there is a possible problem with the email link as it goes through Airbnb and not directly to the hosts private email address.
Let us know how you get on!
All the best
Joëlle