Remove package that is published to users via sccm (powershell)

Hi,

We have a packages that is deployed via sccm to a lot of users.
Although I have deployed an uninstall, some users appear to still have the package/uninstall was unsuccesfull.

If I logon with administrator I cannot see any package (Get-AppvClientApplication).
How do I see all packages and force a removal for a certain package for ALL users?

J.

Jan Hoedt