Thanks for all the replies, don't have caller ID so don't have their number to report, of course, there is call blocking too.
I wondered how they got my number to begin with, never addressed me, that made me suspicious too, but I have had to call Tech Support many times and know they don't call you, unless you have already started an inquiry and they may follow up after they helped you and they give you a case number. After I posted this, got another call and hung up. There were two more calls after that, wouldn't answer.