Employees must be taught how to treat clients and how valuable customers are to the banks

I'm considering to bank with it , but the problem is the employees and manner in which they run their business , not sure if its all their branches but I felt disrespected as a client by the teller who asked me why don't I go and do withdwals outside . Then I told her I was directed no to go outside due to my ATM withwals she was having an attitude . I was very disappointed about the poor service I got afer waiting a long time while other employees are going up and down .