Lack of communication

I have been trying to get answers regarding my business account since the 3rd May. I have sent numerous emails, i have made contact with the call centre, to be told that someone in management would contact me as its to complicated for the call centre lady to understand - even though it is very simple. I have reached out on the online chat and as soon as i give details they dont reply. We are a small business and cannot afford to have funds missing and not paid out but there is no urgency in resolving the issue.