Some bullsh*t web design company keeps calling me even after I tell them to go for a very long walk on a very short pier - obviously they're idiot.

As usual, the phone rings and no one leaves a message.
I pay for Caller ID and I do not pick up calls from Unknown numbers.
If the caller ID is not available my phone should not be ringing.  That is the whole purpose for paying for the service to block blocked numbers.