If you are experiencing issues with your email account, Live ID, password, downloading or updating WhatsApp from the Microsoft Store, please contact Microsoft Support.
WhatsApp identifies you with your phone number, not your email account. WhatsApp does not require a password or an email account, however logging into the Microsoft Store does.
These are the two most common issues when updating WhatsApp from the Microsoft Store:
If you receive an error code when trying to download WhatsApp, it is from the Microsoft Store and not WhatsApp.
If you see "Attention Required" or "Waiting for Wi-Fi" when trying to download WhatsApp, please refer to the settings of the Microsoft Store App. Open Microsoft Store > tap More > settings > App updates and revise your settings here.
Microsoft controls the process for all Windows Phone apps, and we do not have access from our end to resolve any Microsoft Store related issues. You can get troubleshooting steps from the Microsoft Support website.
If you still cannot download or update after trying a couple of times, please contact Windows Phone support.