No response from Customer Care business recoveries

I had a business account with Vodacom. I finally paid off the account and asked that they send a letter stating that the account has been paid off. I also asked that it is updated at ITC as well but I am always given the run around. I have been told to send my request to business recoveries. I did that and after following up many times I still don't get a response. This is disappointing because this account still appears as a debt on my side yet it has been paid off for a long while now.