Account is paid up but Transunion doesn't know

I had an American Express credit card with Nedbank and in 2013 the account was paid up with Norton Lambrianos Attorneys and they do confirm that account has been fully paid up but Nedbank has not updated this information with Transunion. My life is now currently a standstill because this matter keeps reflecting on my records that I have not paid Nedbank. I need a letter stating that I have paid up my credit card so that I am able to move on with my life. Someone needs to get back to me ASAP. Please email this letter to [Email Removed] urgently.