No service!

I received no service from the Nedbank Call Centre. All I wanted to know was how to invest an amount of money and what the return would be. I was told that all the marketers were busy but that one would call me back. Two days later, no call back, so I tried again. After being put through different departments (people do not identify themselves so you don't know who you are speaking to and what their designation is), I left a voicemail on someone's answering service, still no call back. I have been banking with Nedbank since 2005 and am now wondering whether the high service fees is worth the lack of service.