1) Replace your keyboard. The Caps Lock key is stuck.
2) Get a call blocker.
For a land line a call blocker is an electronic box that plugs into your phone line between the wall and the phone. You can buy one on line or at Best Buy.
For a smart phone a call blocker is an app. Your phone may have one pre-installed or you can download a free one.
For a simple cell phone ask your carrier. Or put the pest in your contacts list with the ring tone "no ring" or "silence". That will send the pest to voicemail. You'll have to clean out your voicemail occasionally.
CID read "name not found". Called my landline twice within 2 hours while I was out. Checked and found numerous complaints on other sites. Another supposed "Microsoft Tech Support" calling about infected computers. No message was left on my answering machine. Blocked number