Not helpful

I did an application for R5k and they paid out R30k plus. I called and made arrangement to pay back the difference which I immediately did. They never adjusted the balance to correct the new premium. I called again and was sent from pillar to post. I then called after the wrong debit order was deducted and I was told to reverse it and they will deduct the right amount the next time. I got an SMS reminding me to keep funds for the specific debit order amount which is still incorrect, I called and again sent from one person to the next till I spoke to someone and I told them the story and they promised me that someone will call me the same day at 16h00 which needless to say, never happened. This whole thing is messing with my credit profile and there seems to be no one able to assist me