PATHETIC SERVICE FROM BUSINESS BANKING

I've been struggling to get assistance from business banking. I no longer have a business banker & I was not informed of this. Secondly, the business banker tending to what I need is not getting back me. I have a query of more than a R 100,000 that needs to be solved. No one is available to assist, every time I call I get told that the business bankers are not available. Thirdly, I want to open another business banking account with this bank but no assistance whatsoever. I've been struggling for weeks on end to get this right.