With the new Intune devices 

You should be able to uninstall via "ABR (admin by request) yourself by doing the following:

Select the green tick 

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Go to Tools > Uninstall Program

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On the Prompt > Select "yes" then "OK"

In the window, select the app you want to install
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Click uninstall

This should then go through the uninstall process 

If you are still having issues. 

Please reach out to the agent who helped with your request