Just stop harrassing me with incorrect info

I keep on receiving emails of demand from Hammond Pole Attorneys to pay MTN account which doesn't belong to me. Innocent Madisha was the first person to start sending me this email of demand, then I called him to address this. Then Vincent Mfuphi also started, I also called him and he even send me a proof of print screen that my email was removed from that person's profile. Now it's Nthabiseng Lehola. This emails are really irritating me, I tried to ignore them at first, but I can't anymore. Even worse, they are sending them to my work email, not my personal email.