Wrong person Harrassed

I have receiving sms's. Phone calls from them. But i am not Mrs BC Joubert. I have told them i do not know this person and i do not have an account with, Woolies, Game and RCS and that they must remove my number from their system. But they keep telling me they will make a note and remove it. Several times i have contacted them and explained it to them but they still wont stop harassing me.