Access to N. Backup

I can't get into N. 360 Online Backup - there's no good link in 360 site to take me to the "Backup Home" to access all my accounts and backup sets.  I have found it VERY frustrating trying to access Backup - a search only gets me sales info, and 360 Home and Backup options, My Account, or Norton home site seem to give access to something like a "master" or "home" site for working with Backup.

This results from the problem of "Manage Backup Sets" under N. 360 Tasks only showing the most current set on computer in use.  But I've made backup sets on several prior computers, and need to delete several but can't because they don't show up in the "Manage Backup Sets" window.  So I can't find anywhere all the sets, folders, files and any other content in my Backup account.  I've had to add successive amounts of storage (up to 170 gb) and know I don't need all that but can't figure out how to see it so I can delete what I don't need and don't keep automatically renewing it.