Disappointed and Let Down :-(

I had moved over from FNB Private to RMB some time back, and evidently a product on my profile has been duplicated bearing exactly the same account number, impacting both my credit score and possible home loan negatively through no fault of my own. I have raised the issue countless times with FNB and have been told it will be addressed and to date nobody has come back to me. In desperation, I made contact with the relevant credit burau(s) and I was told that FNB confirmed the listing to be correct and the duplication now stands . Essentially on bureau the open balance and monthly instalment is duplicated which impacts my credit rating badly through no fault of my own which i find rather disappointing as I have enjoyed a long-standing relationship with FNB and to be treated like this is really disheartening I have been sent from pillar to post and even engaged outside to get the issue sorted but FNB don't seem interested as there are erroneous limit records as well. Whilst I understand things may take time, but this has been going on since July and I was told that it was submitted for rectification but seems to be a means to keep me quiet. Really Disappointing team...