Poor Customer service - Business Account

I have requested a limit increase on my business credit card. I sent an email to the business manager assigned to my business on the 28th of February. Kim Minnaar - Cape Gate based) either doesn't take me seriously as a client or has no sense of urgency at all. To get a response to an email takes over 24 hours, she doesn't return any of my calls (I've called the branch and her cellphone countless times and not once has she returned my calls). I have completed the documentation needed for the increase and the increase is yet to be processed.

Can a new business manager be assigned to my account please - one that is Jhb based.

This is rather urgent.