Settlement Letter

I wrote a review two weeks ago, indicating that upon reviewing my credit I realized that my account with Vodacom is still active and I have missed payments. Vodacom got back to me and indicated that I owe R40 on the account a year after I thought it was closed, as I followed all the procedures given to me to close the account. Nevertheless I paid the R40 and requested the settlement letter, which I haven't received to date. I even went to their branch in Midrand and a consultant sent an email to the relevant department and indicated I will receive the letter the next day via email. I emailed the consultant explaining that I am still waiting for the settlement letter and I was told the issue will be escalated. I did everything Vodacom said I must do but still I don't have my settlement letter. I waited for almost two weeks because I wanted to provide positive feedback that my problem was resolved, but there is nothing positive to report. Can someone from Vodacom help me recieve my settlement letter please.