Unenrolled and it reset my Xbox!

I'm currently pending in the unenroll pending, but once the unenroll takes effect I will have to factory reset my console, and when I launch the preview program it simply treats me as though as I am still a member

How did you reset? I just unenrolled

You can remove your console from the program by the Xbox One console with the Xbox Insider Hub installed. To stop participating in the program on that console, launch the Xbox Insider Hub app and go to Settings > Manage Devices. From there,
you can unenroll any console registered to you.

Note Unenrollment can take up to 72 hours to complete, during which time you may still receive console, game, or app updates. When the unenrollment process is complete, your console may be reset to factory defaults. If resetting your console to factory
defaults is required, your data will not be erased.

https://support.xbox.com/en-US/xbox-one/console/xbox-insider-program

This isn't an option for me as I bought the console used and the previous owner enrolled but I do not have access to their profile to unenroll and it doesn't show my console as enrolled under my gamertag. However it is certainly enrolled.

You can remove your console from the program by using any other Xbox One console with the Xbox Insider Hub installed. To stop participating in the program on that console, launch the Xbox Insider Hub app and go to
Settings > Manage Devices. From there, you can unenroll any console registered to you.

Note Unenrollment can take up to 72 hours to complete, during which time you may still receive console, game, or app updates. When the unenrollment process is complete, your console may be reset to factory defaults. If resetting your console to factory
defaults is required, your data will not be erased.

You can remove your console from the program by using any Xbox One console with the Xbox Insider Hub installed. To stop participating in the program on that console, launch the Xbox Insider Hub app and go to
Settings > Manage Devices. From there, you can unenroll any console registered to you.

Note Unenrollment can take up to 72 hours to complete, during which time you may still receive console, game, or app updates. When the unenrollment process is complete, your console may be reset to factory defaults. If resetting your console to factory
defaults is required, your data will not be erased.