poor attitude & service at FNB Greenstone

i arrived at the Greenstone branch at 1h45 for the bank tellers. When i arrived was already at least 12 pax in queue and only 2 cashiers. i spoke to the lady in front who said 1 was ill and other on lunch. i own a restaurant and same with banking majority of people come over a lunch period. queue eventually reached over 22pax, spoke to a guy and he said they have asked Head office on numerous occasions to up the staffing, but HO refuses. eventually they got another 2 cashiers, but only about 30 mins later. I have walked out of the branch twice in the last month as the queue was too long, a guy next to me said he had waited for over 50 mins yesterday. The lady in front came to speak to us, but she was very poor in handling the complaint as the guy who stood in the queue for 50mins was talking to her and she walked off. also the guy who was just standing in the teller area had a bbad attitude. I left at about 14h55 and was late to collect my daughter. When responding to this email, please do not apologise as i have heard this many times, please tell me what you are going to do about it. this is incredibly poor with a slogan \how can we help "