my vodacom number used by someone else

I am receiving calls and monthly statements of Joseph Chiloane....i contacted vodacom customer care to check if we are using the same number with Joseph...They checked for me and advised that this Joseph gave my number as another contact. So to have my number removed under this person's profile they need to get authority from him...but now Joseph does not answer his phone when vodacom calls him...The guy who was assisting me advised me to go a vodacom outlet for assistance.I went to alberton vodacom outlet and they still couldn't help me..they also tried calling this Joseph without response. I mean i don't know this person i am using this number what is difficult to delete my number from someone's profile that i don't even know. The account number for Joseph Chiloane I ********** -7 270 Pretoria st Silverton 0184 I got the info from the latest statement balance owing R638.86 statement date 03/09/2018 Please delete my number under Joseph Chiloane's profile.....!!!!!