Negligence and extremely Poor service

I recently app**** for a personal loan at the bank, Donavan assisted me at capitec bank in mall@carnival. I explained to him how our small business is linked with a company and according to him, he understood. The next day he called me and explained to me they couldn't pick up the company on their system. So then the next day our boo keeper phoned the bank and spoke to Ayanda the store manager. They communicated and as our bookkeeper explained, Ayanda said I only have to bring a letterhead from our company explaining that we are under a group of companies, and then put on the information of the financial manager handling our financial devisions. They are able to provide the bank with all the necessary information of employment. So then I brought in that afternoon the letterhead with ALL the information, Location of our company, contact information and business registration details. With the contact information of our financial manager that are based on a different address due to it is our head offices and we are a small holding company falling under a different name. So Today 21/11/19 Donavan phoned me again to notify me that my application has been denied due that my letterhead provided has the number of the company that we are located inside the premises dont know me as an employee. So as I tried to explain to him that in the letter with our letterhead the information is given there and they didn't use that info, he told me that the bank permanently will deny me a loan cuase it looks like fruad. When I asked so best thing to do now is to close my account with the bank because they didn't go through the letter properly he rep**** with YES.... so even though my salary deposists into my bank account for more than a year, has a reference with information and a letterhead providing all the correct information that they simply didn't want to properly read, I am a "*********" because of their negligence.