@Barbara1198 There are "Do Not Disturb" settings one can try, which allow you to turn off notifications between certain hours, but allow exceptions for phone calls or other emergency contacts.
You could allow guests to call you instead of messaging you if there is a real emergency in the middle of the night. There may be some guests that will exceed the boundaries, but it's better than getting a notification you didn't want.
Support may not be the best avenue for trying to get changes made to the way the app works, especially since they are overloaded trying to deal with calls from folks who have had their accounts suspended due to guests filing fraudulent claims against their hosts.