Indeed. I also got the upgrade notification one or two days ago. The updater had kept silent for many weeks so I thought first it was a new version, but then I saw the release number 18.09… and I stayed on my decision to keep Android 6 for the moment.
Still, you shouldn’t be having so many problems after the upgrade. Android 7 still has a pull-down menu, it is just redesigned. If you don’t see it, this suggests something went wrong during the upgrade.