To change communication settings, go into a contact, select Contact Settings below the row of icons at the top of the page, here you will find switches to accept or deny Calls, Texts, and Emails from that contact. You can also block all communication with that contact, or have that contact pass through system wide Do Not Disturb. Tap here to see a short video on customizing your contacts: https://youtu.be/J9Qg87qwSzs