Silent calls - stop spamming me!

I don't know this company or how they got my details but I've now received 5 silent calls from one of their \automated diallers"(as listed on their website [URL Removed] and I've had enough.<br> <br> Stop calling people who have not solicited calls from you. Stop pulling phone numbers out of thin air. Stop harassing ordinary citizens who want nothing from you. JUST STOP!"""