Cancellation of XBOX LIVE *****ulant deduction

I contacted Standard Bank via email on 10/04/2015 to stop a payment on my Credit Card for an XBOX LIVE billing. I informed Standard Bank that this billing is incorrect. I have no XBOX nor will I ever have. I have sent numerous emails requesting the stop payment as well as called the Credit Card division, I have completed a dispute form. At one stage I received an email from Standard Bank that they are not responsible for this transaction and I must contact the Company. I have requested the stop payment, why should I contact the XBOX company. I would not even know where to get hold of them, are they XBOX or an affiliate of another company. The amount of R50 was deducted from my account once again on 04/06/2015. Why is it so difficult to just put a stop order or cancel this transaction altogether. I have lost money from April to June 2015, because of incompetence and poor service. I have indicated that Standard Bank should reimburse me with the amounts deducted because I have reported and cancelled this transaction numerous times. I also explained to the first line support that I had major brain surgery and cannot visit the bank at present. Still no cancellation!!