Worst Service EVER!!!!

I wanted to increase my limit on my account. I therefore phoned the call centre first to find out what the process is. I was told that I can increase to R7400. All I need to do is take my ID and card to the branch and they will do it there. When I got there, I was told that I also need 3 months bankstatements. I then also went and got it. When I got back to Edgars Centurion, I was told that I cant get the increase because the system does not prompt it. Even though the system does show I can get the R7400 limit. After sitting there for about a hour whereby the clerk tried to figure out the problem and logging a call I was told - sorry we cant help you. This is UNACCEPTABLE. If I qualify for the higher limit I do not see any reason why i can not receive the limit. All systems show that I qualify. I am not happy.