Fraught on my account

I received sms with amount to be deducted from my debit-order much higher than usual. After phoning the call centre (Reference ***) I was informed that it was subscription to a company Opera telecom for 2 products Xcon and Ponsta that loaded my vodacom account daily with a fee that caused this?? I told the call centre person I have not subscribed to those companies, and that I did not give Vodacom permission to load this money on my vodacom contract. I was told I must contact this company (Opera telecom) and I must ask them to give proof of activating the subscription. Opera Telecom will have to pay my money back if they can not proof my subscription to them. I did this, the person answering the phone said she can not help me, the company is overseas and I can only email them??? What is worse, Vodacom ask me if they can cancel these subscriptions? Vodacom did this over the phone This indicates they are aware of this **** company, and have links to them. I feel Vodacom is responsible, they can not allow other companies to subscribe on my vodacom contract without my permission. I tried to contact Vodacoms legal department on nr ***, but could not reach them.