Frustrated by Capitec Bank

I'm so frustrated yet again by Capitec Bank, I have settled my account with them that was handed over by Vertex Solutions, but toy surprise they still not updated my bereau profile with trans union. I have been sent from pillar to post to find amicable solution with my concern but it seems like I'm between a hard place and a rock, for heaven sake you only have to write off R8 on my profile Capitec, how hard is that? I have been told that this matter will be resolved within 21 working days but this has not been the case as 21 days has long past. I'm no longer asking now I'm demanding that my matter to be resolved effective immediately, as this is affecting my credit score.