Nu-debt horror

Nu- debt is a nightmare, my account was handed over to them and I settled the payment. They gave me a run around about emailing Settlement letters and finally when I was just tired of them they send them, yet at Telkom it reflects I still owe them like how have you not updated with your client that the money has been paid up. Their consultant on the phone unprofessional and have attitude except for 2. A lady called Mbali unfortunately there is no reference numbers they told me after I called numerous times to get the paid up letter of the account. Nxa