Unfair decline of account opening

I went to ackermans to open an account qt their Fourways crossing branch , i was told to bring my ID, Proof of Res and 3 months payslips this was 04/10/2017 .They said the account will take 48hrs , after 48hrs i went back since i did not receive a call or sms.I called them on the 10/10/2017 they said something about their fax not working ,then she lady that assisted me gave a number to call she said for approval , 0 ********** 100.I called the number only to be taken aback , on filling the application form i had filled in already at the shop, they asked a whole bunch of questions including my salary and my work place number (they said they would call for verification) , of which they did not , which makes me wonder the purpose of taking our workplace numbers .After a few minutes i received an sms saying your account application has been declined, i sent an emailing enquiring why it was declined they said its affordability , when they did not check anything even my workplace to verify my employment and salary.Iam a CA (SA) so i wonder in terms of affordability what they are talking about .My conclusion is that its because i am a foreign national thats is why i was treated this way , because one of the consultants asked me about my passport because my ID number ends with an 182