Call center has been harassing me

I keep on receiving calls from home choice and they are looking for Duduzile Khumalo, I continue to tell them that this is the wrong number. They continue to harass me, I spoke to Thulani today, who was exceptionally rude when I informed him that the number doesn't belong to this person they are looking for. I want my number removed because this is harassment. I have had enough of this.