Vodacom Adding 3rd Parties and Deducting Subscriprion Fees Without My Concent.

I am a Vodacom customer since the inception of Cell phone in SA. I noticed that my Airtime is depleted unreasonably fast. Upon investigation and with involving Vodacom's Customer Care I established that 3 x 3rd Parties were added to my account. This was done without my knowledge and cost me R 24.00 per day from my Airtime! Customer cate assisted me to stop these and to Block them. However this carried on for months and I suffered major losses.