Unexplained service fees

Feeling really frustrated by a recurring service fee debit which takes place every year on my Elite cheque account which Standard Bank cannot provide an explanation for. I've previously on more than one occasion requested and been charged for debit order details but to date the bank fails to provide those details. Calling into the contact center is another hopeless affair, the time waiting on the line costs more than the actual amount that needs to be reversed. If it weren't for convenience sake. I can guarantee my accounts would have been moved to another financial institution ages ago who firstly does not allow for unauthorised debits and secondly, who are capable of explaining exactly what every charge on a customers account is.