When a private number calls it goes straight to my message bank and does not even ring

If you have enabled Send unknown and spam callers to voicemail

• By going to Settings  > Phone, then tap any of the following:
• Silence Unknown Callers: You get notifications for calls from people in your contacts, recent outgoing calls, and Siri Suggestions.
• Call Blocking & Identification: Turn on Silence Junk Callers (available with certain carriers) to silence calls identified by your carrier as potential spam or fraud.