Standard Bank Card Division is broken

Somehow Standard Bank Card Division SBCD believed that my card was used **********ly. I received a SMS and verified that everything was ok. Today I was trying to purchase something on the web and my card was denied numerous times. I called SBCD and had to confirm my identity. After many minutes of explaining from the operator and answering numerous questions by me I wrongfully answered what my limit was on my card and was told that I failed and he could no longer help me. I try to run a business and now sit without a working card. Your system to verify is ridiculous, all I wanted to know was why my card is not working. And after 10 minutes of hoop jumping you stop the conversation. There has to be a better way, why not send a one time pin to a phone like you do in internet banking. What am I supposed to do now???