Poor Service by Dstv

Good evening ,Dstv does not want to give me a settlement account letter with banking details. I have called Dstv several times and been getting the same response for the past month, as they always saying they will send me the email as per request but till today I have not recieved anything from them. I want to buy a house and my bank requires the above mentioned so I can provide shelter for my family but Dstv has failed me as a customer. I need the settlement amount so my account can be settled .