Ridiculous

I get phone calls 100 times a day from this place, I have no idea how they got my number, the more I tell them I am not the person(s) they are looking for the more they call and call, I have had enough of this damn place calling me, as they have now started calling after hours and on Saturdays (family time) this is totally unacceptable, when I tell the consultant to take my number off the list they just say (I will tell the technician to take your number off) and that same day I will still get more calls, this has been happening since last year around may, I mean seriously do they not have the mentality to realize they have the wrong person!!!!!! Most of my call log consists of their calls, I have tried blocking numbers, but they have like 100 different numbers. I have even emailed them with my number asking them to please stop calling, but to no avail. How can this place harass someone like this?????????