My personal information is exposed to third part.

I have been a client for Nedbank since I was at Varsity and trusted Nedbank with my personal information on my account but now I am regretting that because last month on the 10th of September I nearly bought something on clicks online but I didn't complete or proceed with the payment ,only to find out that this month clicks deducted the money for that product on my account without even giving me notification e.g sms nothing was sent to me to see that Clicks has deducted money from my account without my approval and the worst part is where is that product because I didn't receive it and I never received any communication from clicks.My biggest question is why didn't I receive sms from Nedbank to show that Clicks has deducted money from my account and why this is not shown on my statement Nedbank money app ?.is Nedbank running a **** this days?,is Nedbank exposing our personal information to the third part without letting us know about that?,is Nedbank not to be trusted anymore?.I called your agent didn't help me,so I am deciding to take this matter to my legal advisor ...