Incorrect information on credit report

To whom it may concern, I wish to ask that you address the matter concerning my credit report for the last time. I am sick and tired having to go back and forth with this company begging them to update false reports pulling up on my account. The latest is a report for a 2014 account that I do not have possession of. I wish for this to be rectified with immediate effect as it is affecting my credit score negatively. I would appreciate it if someone would contact me as soon as possible to explain what is happening there and why the account has been updated as unpaid. Thanks you