maybe an old vulnerable signed driver can be used to load the new version :D. on a more seirous note, i think contact with a person at MS, likely via socials triggering that, might help here. It all depends on the reason for the ban/block/cancel.
if they had a reason other than 'oops mistake' its likely just going to remain in place. (sadly, that is how MS is. if you care for privacy maybe go to BSD)
Who said vulnerable? Perhaps just a driver with less features.
GP refers to the practice of getting kernel level code execution using other, old vulnerable drivers and using it to run the VC driver.