We recommended you do this from the HUB. For directions on how to do that, click HERE.
Blocking a contact keeps them from texting any of your numbers. It works just like it would work on your phone to block a person.
Option 1: Legacy Inbox
In the inbox search bar, search for the contact by their name or phone number.
Select the contact you wish to block. Note the green arrow (image below).
This is the Block User icon. Click on it to block your contact.
Option 2: Via the Contacts Page
Search for the contact in the top right corner.
Click View (eye icon, blue circle) to block this contact.
Click on Block.