Help Desk doesn't Answer

I have lodged a dispute on the 18th of November last year and to date I haven't received a responds either via email or phone. We I tried to phone the Help Desk the phone just rings with no answer. I believe I have a valid dispute that needs to be sort out, as this mis-information is impacting my credit score. We don't need the come to site like this one in order for Companies like Experian to respond to our queries. If I look at the other complaints on this site about this Company they are very similar, NO RESPONSE.