Online banking app not working

I called standard bank and waited 14 minutes to speak to a consultant, after speaking informing the consultant about my issue with Standard bank app I was asked to security questions. As I was confirming my details the call cut off. I'm frustrated because the consultant didn't call me back to try and assist me with my issue and the worst part the consultant has my contact details. So does this mean I must call again and wait another 15 to 20 minutes? Surely the service could be a little bit proactive in trying to assist their customers.