How do I block a number
Use either Verizon's 5 free numbers for 90 days feature in My Verizon
or use an app like WhtePagesID, Mr Number, TrueCaller, etc...most of those will ID numbers, block and other features.
Those are free apps as well.
You can use Verizon's Family Base as well.
Some Androids have a send to voicemail feature in the Phone/Call settings menu, others have an actual blocking feature. (depends on your model.)