Very slow customer service

I spent over 45 minutes in the queue at ABSA Canal Walk before I was helped. The service is extremely slow - mainly because they don't have enough staff in my opinion. They provided one extra staff member to man the counter when I asked them to do something about it. 3 minutes later one of the existing staff members left with her bag over her shoulder. There were 8-10 of us waiting for service with only two staff on duty. It took some matters over half an hour to be resolved. I was there at 11am today - not peak hour!!! Reason for this message is that its not the first time I've received such slow service at this branch.