Thank you to everyone that replied to my question.
As I stated I have Phone Power for my SP, I have used the 50 number blocking that comes Phone Power and they do not sell more blocking slots. I want to be able to block any number that comes in, in my area all the telemarketers use cell phone numbers or a number that comes in as caller ID of a state. So I can't use anything that will stop robo calls. I am getting 1-20 calls a day from various foreign sounding people from online pharmacies, and other companies. So I need to block unlimited numbers.
I am considering the Obi-extras but don't know if it will do what I want.
Thanks again for any suggestions you have.