account paid but not updated

I had an account with blue Financials that was handed to DMC and I have then settled the account on the 26 January 2015 and DMC forwarded me the paid up letter ,I called their call center to update my account status and was told that I must forward the letter to blue Financials but all the Contacts numbers for blue financial they not axis ,I then called DMC call center again and was told that the request was sent to blue Financials .up to now my account is not updated on my credit report and this is going for 7 months after the account was paid and it still shows unpaid and 9 months in rears can someone assist me to update as the call center is useless as when you call every consultant you talk to give different explanation. I want my credit record updated as soon as possible <br> <br> <br> <br>