MBD harassing me

I am being harassed to no end from this company! Constant calls and messages and I am not the person you are looking for. I have called in a few times to tell you people this. You then remove my number (or so you say) but two minutes later the calls start again. How are such ************ people around to run a business? Stop harassing me or I will have to take it further. How do you get my personal number? That is not legal.