I blocked a number on my IPhone. Will I see if this person tries to call me on my Verizon bill?

I blocked an annoying contact on my IPhone. I'm wondering now, when they call or text, will I see those attempts on my Verizon bill? Or not? Just wondering; I'd like to see if they're still trying to call, and if they've finally given up pestering me.

Also: When they text, I believe they'll just see "delivered" (but not "read") on their phone. What happens when they call? Does it go to a dead end VM, where they think they've left a message, but it's never accessible? Will they have no idea they're blocked, but just think I'm ignoring them?

If I later unblock them, do these VMs suddenly appear? Or the texts? Or are these gone forever (hopefully).

Attempts to call don't show on bills.