Unfair

I was recently Handed over to Hammond Pole and Attorneys an external debt collection agency to collect on behalf of Vodacom which I accept that I didn't pay them for a while but once handed over I made a payment arrangement to settle the account with 3 payments. I played my part and kept to the arrangement but Vodacom has failed to update my details at the Bureau and I still get sms's from the debt collectors that my account is still with them even after they sent me a settlement letter. I just want this account closed and my name cleared at the Bureau.