Unauthorized Company

I was called on 17 Febr at approx. 10:11 from a no +***6 a company called mondeo, said he is calling on behalf of Vodacom an associated company of Vodacom, and wanted to ask me some questions.(he had my initials and surname correct. I again asked for the company name and its link with Vodacom. He repeated the same as above. I told the person I am not happy with the Vodacom sharing my information with another company and ended the call. I phoned Vodacom and the denied any association with company. I think Vodacom should inform all customer about this company and investigate their action. <br> <br> Regards<br> F**** Prinsloo