Unreserve Windows 10?

Does anyone know how I can "unreserve" Windows 10?
I once reserved it, Microsoft downloaded the file and I decided no to install it right away.
After all, Windows 7 is good for another five years or so, and I've got a year to male up my mind..
Now, the panel has gone back to its earlier format where it appears it will be downloaded again.
Each time, it eats into my quota of permitted download bandwidth (which is limited).

So: Can I "unreserve" the reservation?
Can I "unfriend" Microsoft?

Thanks!

If, for some reason, I decided not to use Windows 10 right now, I would create a system image of my computer, then do the upgrade. Once activated, I'd roll back to my previous OS. This way, when you go to Windows 10, you can go right to a clean install.

Try 2 things:

1) Open up the windows 10 app (window icon - Get Windows 10 app). Select view confirmation then click on cancel reservation.

2) If it still downloads, you can try removing the update KB3035583 in the control panel under the windows update section. (View Update History -> Installed Updates (To Remove Updates)). You can hide the update if you wish to not install this or keep popping up when there is a new windows update.

There is a media creation tool that will allow you to make a media disc for windows 10 if you wish to upgrade before the year is up without having to download the Windows 10 update from Windows Update or mess with a reservation.

Thank you, DeaconFrost and GamerwGlasses for your useful responses!