Bad service from Vodacom

May someone please assist me. Some person in bloemfontein upgraded my contract which was ending Last year in November 2022. I have no idea who this person is and I have been calling Vodacom over the matter and i have been sent from pillar to post. I mean that persons signature should not be like mine and the picture on the **** ID with my details is not me. I mean Vodacom can prove easily that it is not me. Can someone help me with this matter I mean it has been going on from last year November and nobody from vodacom even tried to contact me. Can this matter be resolved ASAP.