Borderline Stalking

These people keep pestering me, phoning me multiple times a day and receiving multiple sms's looking for a Mr Morake,I keep telling them I don't know this person and to remove my number and stop harassing me,but yet the calls and sms's still continue!!!!!It's infuriating.What else must I do to get it through to you people that I DONT KNOW MR MORAKE AND NEITHER AM I IN ANY WAY AFFILIATED WITH HIM!!!!!!!