Vodacom selling your personal information

I received a lot of SPAM calls this last few days. I just had it when Smart Mobile called me trying to offer me some sort of service. I asked the Lady where did they get my number, and she told me they are partnering with Vodacom, Cell C etc. I did not give vodacom permission to sell my personal information to ANY marketing companies or ANY other company at all. Please remove my number and have a look at your contract terms and conditions as I never gave the right to Vodacom to use my personal details for marketing.

Quoted from Vodacom Contract terms and conditions: 11.1.3. any of Vodacom’s shareholders, related entities, suppliers, agents, professional advisors or any company within the Vodacom Group for marketing purposes, subject to your right to restrict receipt of unwanted marketing material or other rights in terms of the Consumer Protection Act, 2008;