Bad customer service/service delivery

I don't understand why customers cannot be assisted inside the branch for deposits. On this day, the atm queue was long went inside the branch to be assisted in making a deposit, an employee by the name of Tahr told me that I cannot be assisted inside the branch, to my surprise the branch inside was not busy, two teller counters with no clients, he asked if I have coins or a deposit of R20000, if not I must go outside not showing any interest in assisting. I don't understand what kind of service is that at FNB, I understand that clients should be migrated to atm self service but atleast assist in busy day as well as acknowledging old people and those who cannot stand long unless you undermining township residents. BAD CUSTOMER SERVICES