Have you tried holding power and volume down until the phone shuts off?? That's the first thing i'd do.
Call vzw and have em check your system settings..
Then i'd power off, remove my sim, power on.... power off, replace the sim, power on.. be careful with the sim(white plastic with a gold foil sticker, it delicate)
Now try searching for the update again.
Are you able to download apps from the play store on mobile data?? If so you should be able to get the update while on mobile data...
If you still can't get the update, this sounds extreme, but do two factory data resets, back to back, then search for the update.
FDR's are pretty simple now.. so don't sweat it if you need to do that.