record still not cleared with Trans Union

on 20/08/2015 I took the liberty of calling Vodacom to check why they still have not cleared my records with Transunion as it still shows that I have a balance of over R7k. I spoke to Lebabalo who advised that the company has and last update was sent 17 August, he even promised that in 48 hrs I will receive a confirmation letter from Vodacom advising of the account settlement. This account was already settled in May and we are now in September. How long does it take Vodacom to update their accounts???? I have paid you what is due to you and need that letter to update my own records as well as my credit record updated accordingly