Finding older iCloud backups
I would like to know how to access an older iCloud backup that doesn't show up in the options when restoring my iPhone. My iPhone 6s Plus is running 10.2.1. A few weeks ago my phone suddenly started experiencing extremely fast battery drain - I can't get 4 hours on standby. Apple employees (in person at an Apple Store) had me reset my phone and setup as a new phone to confirm that it wasn't simply something in my profile/settings causing the problem. So, I listened to their suggestion, went home, made sure I had a backup (iCloud), reset my phone and discovered I still had the same problems with battery drain. This evening I decided to restore (again), but all of my backups from before Feb 19th are gone. I'm really not pleased right now ...
iPhone 6s Plus, iOS 10.2.1