Totally apathetic service

The FNB call center staff are all so very apathetic that it is scary. I am supposed to have a private banker that is NEVER available. Tried a few times this week with no luck. In private client department I asked for a manager but now about 3 hours later still no one called me even after I had to follow up. So I can't even try and complain that I can't get consistent explanations because who do I complain to?