Caller ID Unknown Name, no message.

Keeps calling. Does not leave a message.

Someone keeps calling me from this number trying to sell me antivirus. They falsely represent themselves as being affiliated with McAfee.I continually tell them to take me off their call list, but they refused to do so. They call me 2 and 3  times a day, sometimes from different numbers. What can be done?

Don't bother with them in any way if possible. Instead of answering the phone either manually, or automatically, let it ring clear through so there's no answer of any kind. That way calling you becomes a big waste of their time that they get nothing with. If that can't be done, see about a call blocker/app, or blocking the number.

Called again, at least third time, Unknown Caller, no message.