Poor Service

On Friday 15 May, I called Vodacom Call Centre (***) and spoke to Kagiso from Accounts Department. I requested a paid up letter stating that I no longer hold an account with Vodacom. I was promised that the letter would be emailed to myself within 24hrs yet I still do not have the letter. I have been making several calls to follow up on the matter yet I am being transferred from pillar to post, holding on the line for over several minutes. I am completely dissatisfied with the service I have received.