Complaint Resolution Centre did NOT call back

I filed a report on hellopeter.com (see link: http://hellopeter.com/standard-bank/complaints/did-not-call-back-*** ) about an incident at Standard Bank The Glen. I received a response the next day stating that a resolution specialist would contact me from the complaint resolution centre to try and resolve the matter. I was contacted by them on 5 March 2015 @ 12:07pm and the consultant asked if it was a convenient time and I said it was not and I asked can they please call me back in 30 MINUTES as I would be available to talk then and the consultant said that they will be fine and that they would call me back. It has now been more than 24 HOURS and I am still waiting for them to call me back to resolve the issue. The customer care at Standard Bank is honestly one of the most shocking I have ever seen. So must I just assume now that my original complaint is now going to remain unresolved? Because clearly Standard Bank don't care for their clients (potential or current) at all! There is absolutely no excuse for not calling me back