Is this how you treat an old customer?

I'm an old client who has been approved for loans by your company over a number of years. I have never ever missed a payment. I recently app**** for a loan, after having paid off yours and I wanted to renew it. I was told I need an arrangement letter done by one of my creditors to show that I had made an arrangement with them. I spent 2 weeks calling an 086 number (Altech Autopage) and because they were closing down the company this proved to be a challenge. After I went on twitter it was finally done for me. Old Mutual had told me this is all they need in order to approve a loan for me. Sent it through, then they requested an MTN letter. Once again I had phone around asking for a letter to be done. This was done, I sent it through. Then they needed original statements to be resent. I went and dropped them off they assured me all is well. The whole of us yesterday no one got back to me. I phoned this morning, as soon as I said my name, they hung up and told me I've been declined because I am paying African Bank an amount that you view as being low. Excuse me? What does that have to do with you? My arrangement with African has worked out just fine. This is not valid at all!