Standard Bank Brooklyn Mall

Yesterday I went to the Standard Bank branch at Brooklyn mall and received one of the worst services ever from a male teller. This was not the first time getting treated like trash by the same teller, I remembered him from the other experience I had with him a couple of months back. I got into the bank around 15:10 and registered at the front desk. By the time I got to his window, it was around 15:30 and the front door had been closed. My assumption was that in any establishment, the people who are already inside when the doors close get to be served. The teller in question shouted at me saying I "deliberately" went to the bank at closing time because I wanted him to work overtime. The other time I mentioned, he also mentioned that I was not supposed to go to the bank in the afternoon and was wasting his time...Is this an acceptable way to treat clients, who pay for services by the way, through the hefty monthly fees? Are we not supposed to have other commitments on the days that we visit banks for assistance? Worse still, I had a baby, yet this teller did not even take that into consideration.