Follow the steps below to uninstall the Tuvis managed package from your Salesforce instance:
Go to Setup > make sure Tuvis app is not chosen on the (Lightning component toolbar).
Verify that your users don't have the Tuvis permissions inside their profile. (Assign Tuvis Permission Sets).
From Setup, enter Installed Packages in the Quick Find box, then select Tuvis (Formerly Whatslly).
Click Uninstall next to the package.
Determine whether to save and export a copy of the package’s data and then select the corresponding radio button.
Select Yes, I want to uninstall and click Uninstall.