Still no response from FNB

I put a complaint about FNB last week sometime. It was regarding my loan application that was declined after it was approved,this was due to FNB's mishap.To cut a long story short, a lady called me a day after to apologize about the matter & assured me that someone will call me back from the loans department to process my application because this was in fact a misunderstanding from your side & not mine. Its been a week already & Im still waiting for that call. I have even requested many call backs via your website & still nothing. I was offered x amount on that loan, I had already set myself out knowing that I am going to take that loan but with the way FNB has been handling this, I wont be surprised if that window has closed & I wont be able to proceed any longer. I am totally shocked & disappointed regarding this issue & I have to sadly accept the outcome all because of you.