Very disappointed

I am beyound angry right now. I am a Capitec client for many years and today something so shocking happened. My bank account was hacked and here I thought Capitec is so secured. I received sms notifications for international purchases to the value of R10 244.00 I only received 3 alerts where I had to enter my code and that was for a small amount. as for the big amounts no alerts came through for me to approve. This is beyond shocking that someone could actually use my account details to purchase items. I want this investigated. I had to block my card and I'm pretty sure that I will have to pay for a new card now. I was charged for this transactions and I want this reversed. If Capitec can not tell me how on earth this happened then I will move to another Bank that can assure me that I am secured.