service delivery

After they gave me feedback and said the money will be written off and I must go pay amount which I went paid the next day but then I had to call customer care to activated my line which was also hassle cause they saying still owe the amount which the Cell C rep and I argeed apon that was to be written off. I tried upgrading aswell thinking I'm in the clear still I had to be told it not done yet so everytime it a fight on fight I mean I paid the money next day why does it take so long then to clear it what was agreed apon