Unhappy customer from African bank

Hi I had a loan of which I settled last week on the 4th of January. I have been requesting for a paid up letter via email and calling African bank. I keep getting emails from African telling me that they will attend to me ,I even resorted to calling their customer services they just keep on sending me from pillar to post and promising me that they are emailing the paid up letter till this day.Im really not happy about this as I have already spent R180 worth of airtime trying to get help from their customer service.