Do not take calls do not provide service you require

I have tried getting in contact with Experian a number of times within the past week. An updated was requested by Finchoice on my paid up accounts which still have not been done to date. Finchoice were late in updated my records a year later, I called Experian to explain this last Friday and they informed me to expedite this I need to go back to the credit provider get the details of when the email was sent, and come back to them. I have since been trying to call Experian but to no avail. It just rings. I am now in a position now where I am looking to secure finance, but have these records on my system which is adversely affecting my affordability. For such a reputable credit reference agency this is astonishing.