Content services keep on coming back

<p>Last month I noticed a charge on my account for content services. I phoned Vodacom to cancel any content services on my account. The agent told me that you can easily click on opting in by mistake. According to Google search Vodacom has a double opt in service. Tonight I just check to make sure that there is no content services on my account there it is again. I phoned Vodacom to cancel it again and was told that it is the same content services that I have cancelled last month. I have checked and there was content services billed in April, May and now in June again. After last month's bill I was especially careful to be on the lookout for any possible content services and to definitely not to click on it again. I am now almost 100% sure that it was a **** and I want Vodacom to provide me with proof that I have opt-in for such services and when I have opted-in or otherwise arrange for refunds of all content charges for the last 3 months.</p>