Vodacom adding subscriptions to my account I am not aware of and bill me for it.

Vodacom added subscriptions to my account, which I did not know about and billed me R188.79 for it, when I noticed the extra amount on the invoice I contacted them to find out what it was. They informed me it was subscriptions that was added, I however never requested any of this to be added and was not even aware of it, until I saw the invoice for the month. How can Vodacom add these things without my knowledge. I would like to be refunded this R188.79, since I did not add this. Vodacom also needs to indicate to me where I have requested this be added and where I signed or gave approval for it to be added, if I am not refunded, I will take the matter to the consumer commission. I have also heard from other people who had similar experiences, so it seems to be a trend at Vodacom where they add subscriptions without the client's knowledge, then invoice them. Totally unacceptable and like I said, they need to show me where I requested this be added or gave my approval. I also logged a request that the amount be returned to me, but it was deducted regardless, the reference number is ***.