Uninstall Updates: Open the Google Play Store, search for "Phone by Google", and click "Uninstall" to remove the latest update.
Disable Auto-Update: In the Play Store, go to the three-dot menu for the app and uncheck "Enable auto-update" to keep the older version.
Clear Data/Cache: Navigate to Settings > Apps > Phone > Storage, then clear data and cache.
Disable the App: Go to App Info for the Phone app and select "Disable" to prevent it from running.