Poor Service

About two weeks ago, I went online to apply for a credit card. A day later I received a call to get more information which I provided, and the lady advised me that the application has been approved but I needed to send a Payslip and three months bank statement. I did not send the documents and decided to just forget about the application because I would not be able to produce a payslip as I had just started a new job. Then two days later, I received another call as a follow up, the lady enquired if I had sent the documents, and I advised her that I did not because of the above mentioned reason, she then told me that it is Not a problem,because only one of the documents is required so I sent my three months bank statement and copy of ID. I called the following day to enquire, but this arrogant told me to wait for response which I did. To my surprise yesterday I receive an sms informing me that my application was declined because of false documents sent. I called to enquire and resent the documents, but again I receive a decline message because I cannot prove income. I have three investment accounts with Nedbank, how did I fail to prove income? And I am Not blacklisted.