Experian not updating records and providing incorrect details

I had a dispute with Homechoice as a *****ulant account was opened. After this was resolved finally Experian updated the ClearScore records but added the account as missed payments again the next month

After numerous communication and confirmations from Homechoice of updates Experian just replies with feedback of them have to investigate before updating.

I have now lost numerous credit applications as the details are not being updated.