I'm waiting more than a week for the call back - I called back the next day myself and waited for what seemed hours for a data operator. When at last the operator answered, he was polite, well spoken, understood the problem, and actually took time to explain it to me in a way recognising that I was tech-savvy. In the end, the info he gave educated me, and I will need the call centre less in future.
If the system is supposed to call one back without losing ones place in the queue, why not announce very erly it so on the system? Many people would prefer to wait for the call back after holding for less than a minute than to hold for 45.
It would reduce client frustrations a lot knowing one will be called back in the order of the queue. Maybe confirming the fact that one has a place in the queue with a reference number by SMS will increase the user confidence in the system.
Obviously, the system has to be working faultlessly first