********** transactions on my bank account

Last week I opened an account at Capitec and only started transacting yesterday. To my surprise, I just received an SMS saying money has gone out of my account. This is strange because I have my card with me and I am currently at work. I immediately called the call center and they asked me some security questions which they tell me I failed. Among others, they asked if I have downloaded an App, and my answer was not yet. They also asked if I registered for cell phone banking and my answer was not yet. If my answers were wrong for these questions, clearly there is someone who is **********ly accessing my details. As soon as this matter is laid to rest, I am cancelling this account.