Wesbank: not really into financing?

So, I app**** for finance through Wesbank. Took a week o deliver the verdict that my application has been declined. I gave them the following: Comms statement 6 months banking statements Transactional payment document from company I am an agent for, as a sole proprietor under my own name. From what I can gather from the dealer is that Wesbank says my comission statement is in Excell and therefore not an official document as it is not a payslip hence not really proof of income- what is funny is that my bank statements reflect every amount on the commission statement every month, so I don't know if the bank statement is also regarded as not really proof of income? My credit score is good, no accounts in arrears etc., although this will now affect my credit score....which I am not happy with either. All I want now Wesbank, is an official letter stating the actual reason or reasons for the decline of finance-delivered via e- mail. Regards

Willie