Showmax duplicate payment and bad customer service

When I registered for the Showmax service their system allowed me to purchase two mobile subscriptions. This is a huge glitch on the system as this implies one person can pay one to infinite subscriptions. In my case I was charged twice for mobile service on same month. I escalated this to Dayne and he was very political with his answers as he did provide any reasonable explanation for this behaviour. All that he told me was " that is what you purchased..". This was a very political answer which has no clear potential for resolving a problem at hand for current and future reoccurrance. I did not get an option of refund or reinstating my funds. How is it possible for one person to have subscribe to two of the same services. I am shocked at this as how Dayne also was not apologetic about the system fault. I did also advise that he raises a problem ticket to Showmax software department. This is a *******