refuse to refund

On the 30th July I went to PNP Eyethu mall to buy my mother a cake on her birthday, the cashier did a tap and go by mistake and later did a cash request, and advise the tap and go will reverse that, after checking after a week both amount a were debited from my account, I went back to the store on the 14th and we called the accounts department was advised to call after 8am, I called today @ 3:30pm go through to a rude guy who doesn't understand what a customer services telling me about company policies that I don't wanna know, I'm so disappointed in PnP for refusing to refund my money, and believe you me this is not the end of this, I'm gonna take this further, I'll call again and speak to the same guy, who's gonna be as rude as hell. All I want is the refund on my money nothing more