Slow decline in service from Standard Bank

Have had multiple business accounts with Std Bank for almost 20 years now. The service continues to decline. My business banker sometimes doesn't respond to emails. What has now caused me to consider moving to FNB is the fact that my business banker at K90 branch, blatantly and without any merit denied us even applying for finance on a motor vehicle. What is insane is that the businesses combined hold over R17m in assets and combined has an annual turnover of over R20m. And hold on for the best part, we want to put down a 50% deposit on the value of the vehicle.