3.5 months and still no refund

At the end of July 2015 I made the mistake of paying into an old MFC finance account an amount of R339 when making month end beneficiary payments. On the 6th August I wrote to them asking for my error to be rectified with a refund back to me. That was 3.5 months ago. Ever since I have had to endure a long rigmaroll telephone conversation everytime explaining the situation, followed up with a resend of all the proofs. Followed with profuse apologies and promises !...One asks with tears in your eyes how the hell can such supreme inefficiency persist !!!.........but be late with your payment by fractions then they have all the information at their fingertips !......Why do we have to put up with this kind of BS ?