Wrongful lsiting

I had an account with Edcon group that was settled and closed in 2014, that account is still reflecting as current and in arrears on my report, that affects my affordability each time I apply for credit. Experian does not respond to emails, nor do they answer calls. I can't even escalate the matter with the Ombudsman because there is no Dispute reference number, which I can only get from experian. This is really frustrating.