Bad Service and Worst Nightmare

I have paid up the account in November and logged a dispute with TransUnion but Blue Label Connect said I still owe them. Been calling your call center to get assistance but no one seems to help as the agents say they cannot find anything under my name or ID Number and this has been going on for the past 7 months and all your agents do is keep me on hold and hang up on me. The service is horrible I need this resolved asap but I am not getting an help.