Bad customer service

FNB business banking is very disappointing. My account with them for more than 6 yrs and my turnover for the past 12 months, more than R1mil but they don't want to give me a credit facility because "I am high risk" according to them. No RD's for the past 6 months and the business banker is nowhere to be found. I went to 3 branches and Leticia Bloemhof is not responding to the emails. I have a good credit score, what's the risk? my skin colour?