Hi Ron,
Norton Secure VPN comes with a few subscription options: 1 device, 5 device, or 10 device.
If you only have the account for a single device, that may be why. If you have a multi-device account then you would want to reach out to Norton for support. I found their support page here:
https://support.norton.com/sp/en/us/home/current/contact
If you are just having trouble downloading it, check that a firewall or other security program is not blocking the download or installation.
Hope that helps!