Make sure you have the very latest version of the application.
Make sure you have given enough notification permission from your mobile phone.
Log out from the device, download the app again, and re-login.
Make sure to allow the notification and sound permission.
How to Check Notification Permissions
On Android
Check your notification settings by following the guide at: https://support.google.com/android/answer/9431959?hl=en
On iPhone
Check your notification settings by following the guide at: https://support.apple.com/en-in/HT201925
Still Having Issues?
If you are still facing the same issue after trying the steps above, please contact our support by creating a ticket.