Applying for an overdraft facility takes forever

I have app**** for an overdraft facility on Thursday 18 June, I received an Email to say that it has been approved in principle and that I will be contacted within 2 working days. I then called back on Monday, 22 June to follow up on the Status of the application and was told to allow them until Tuesday. I received an sms late Monday afternoon (17:00) just to say that I should submit my Payslip, could they not have told me this earlier? Since I had already left the office by that time, I was only able to submit my payslip the next morning, Tuesday 23 June 2015. Still didn't get any response so I called for feedback but to no avail, again. Today I called yet again and after being kept on hold for almost 15 minutes, I was told that my payslip was outdated. This is admittedly a mistake from my side, but if they had just let me know I could have corrected the matter there and then. This poor level of service is unacceptable. I recently switched to FNB and I am already starting to regret it.