Charged *******ly

When I received my Vodacom Account at the end of March I was quite surprised to see a new deduction added to my account called Content Services. I was being billed by a company called Mira Networks, who I have no idea of what they are doing or selling. Who gives these people the right to activate services on cellphone accounts whitout the authorisation of the cellphone owner. I have never responded to any sms that was send nor did I accept any offers being made or subscribed to anything on my cellphone, as this is my workphone and only used for business purposes. Please explain to me how this happen. I would like my money back that was deducted from the 15th of March until today as I never asked for any service from your company. I think that this is one of the biggest ways to cheat us South Africans out of money. It is disgusting!!!