Standard Bank Business Banking - Very Poor service

I have been trying to get my Internet banking payment limit increased for almost two weeks. My relationship manager gives me no feedback unless I contact her. I have also tried to get through to her manager for help, but she has not responded to any of my messages. Until the limit is increased, I can not make a payment that I desperately need to do. Each day I'm losing R150, and so to date have lost over R1600. As an NPO every bit of income for us is essential and has a life changing impact on our beneficiaries. I would love a resolution on what should be a simple process.