Lost my Trust in Nedbank

I did a one month subscription via the net as a online card payment. This amount went off again as a online card Payment. I then asked the bank via my app chat what it was for and then I said I need to have it reversed as I subscribed only 1 month.. Where they rep**** to they can not reverse the amount. As I did approve the transaction.. I need to give it up as *****... I will do that cause I am not in the wrong here... My main concern here is that anyone can take card details and deduct as they please. And Nedbank would sit back and say to there client that you did approve the transaction the first time... Yes I did.. But for just one month... Not approved it for a second month. And that the bank will not reverse the amount that is wrongly deducted is getting me under... This "approve it" **** is also just a load of ****... I can't trust my bank anymore.. Nedbank.. I was wrong about you.... Very wrong...