Vodacom Settlemt Letter

Vodacom is making my life a living hell. I have been asking them for a settlement letter for my Vodacom account for the past week from the 28/07/2018 and they keep sending me from pillar to post about sending it and I am up to my wits with them. all I want is a settlement letter for MY account so I can pay off and close the account from the 28th am waiting for the letter I have requested. I called again on the 01st because I have not received it I confirmed the email address 100 times however they keep telling me they have sent it through. If this does not get through to them I don't know with their stupid, rude, *********** consultants that answer the call like you wasting their time when calling through. I need that Letter ASAP!