Frustrated by completely apathetic responses

Absolutely impossible to get any kind of intelligent response from managerial people. ARE there any managerial people?? Been trying to resolve an issue for the past four weeks. I send detailed emails over and over and get completely useless one-line email responses from some random person who doesn't understand, and doesn't have a title or a position in their signature. I am supposedly a "private banking client" with five accounts and have been a client for 30 years - good luck getting to actually talk to a human being who cares and can understand and take action.