Application lost and no one wants to admit it

Last week Wednesday I app**** for an increase on my Revolving credit. Did the application over the phone with Bongani, and it was approved \online\". On Thursday I supp**** my payslips as requested and the application was submitted. I was told it could take up to 48 working hours. On Friday I mailed to find out if everything was ok, but received no reply from Bongani. Monday morning I mailed again, and still did not receive any feedback. Later I called my previous private banker Zodwa Mzizi and asked her if she could see if all was ok. She informed me that the system does not have any application in my name on it. I immediately mailed Bongani again (I only have the email), asking what is going on. He came back rudely and told me to wait the 48 hours and demanded to know who told me that there was no application from me. So I copied Zodwa in on the email, and she also mailed him and informed him of this. Again absolute silence, no reply. So Zodwa informed me to go to a branch and just do it there because its suppose to be instantaneous. This after I have already spent almost a week waiting and wondering, now I have to take of time so that I can get to a branch before they close at 3 "