Repetitive Phone Calls

Their methods of obtaining information and possible clients are despicable. Truecaller luckily blocked most of their numbers (there are many), but some did come through. They phoned me each day for two weeks. Eventually I answered and asked not to be phoned again, which I shouldn't HAVE to do in the first place. The person immediately phoned me back afterwards just to make sure. I could hear him laughing while I lost my temper. Just for general knowledge this is the very definition of SPAM. Anyway, I spoke to my friend that "gave" my number to them and he said it was over a year ago. Guess it is though times if you have to phone people that wasn't interested again and again. So I ask, do not phone or contact me, not even to say you received this post. This post is for the benefit of the public and NOT an opportunity to contact to me.