Credit Card Division not attending to client calls

I visited the Pretoria branch by Pretorious Street in the CBD. I want to increase my credit limit. They told me I have to contact the call centre because they don't do it within the branch.<br> <br> The whole of last week, I have been at the branch, make the call in the morning and I would hold for an hour and no consultant to assist. Then this week I changed to making the call afternoon before the branch close, still no one is willing to answer.<br> <br> If this service was provided in the branch, things could have been easy because now its frustrating. Just to increase a credit limit one has to suffer. I'm now considering trying another bank where customer queries are attended and taken seriously than left to listen to a voicemail for an hour.