6 weeks for Vehicle Finance!!

Highly shocked and disappointed by the customer service from Nedbank Gateway. How is it that it takes 6 WEEKS to get approval for vehicle finance...and I am still waiting. I've made contact with the branch manager after 3 weeks due to initial poor service and communication, but then did not receive any follow up there after. I emailed their customer care department and still no feedback. How is it possible that the dealership takes 3 DAYS but NEDBANK who I bank with, takes 6 WEEKS. I have had to continuously follow up and then still wait for answers which I still have not received. Unfortunately the person who I have been dealing with has not once called to provide any information and does not seem aware of the process. Any other banks willing to have my business???