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
Go to Tools > Uninstall Program
On the Prompt > Select "yes" then "OK"
In the window, select the app you want to install
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