settlement latter

my credit review is looking bad due to poor service provided by vodacom. I had a contract on this account no I*** with Vodacom, it expired i stopped using the sim card, I later learned that Vodacom is still deducting money for this sim card. I decided to stop the payments on my bank account. I later realized that my credit check review was bad due to lack of payment of the unused sim which has expired a long time ago. I contacted Vodacom settlement department to correct this problem, was told that i will receive a a settlement latter after 3 days, it has been a week waiting for that latter. I contacted Vodacom again was told that they don't have access to that latter, so instead was given an email address by the consultant (nombulelo ntoi) where I should request the latter. there's no reply on my email (***) and I am left with a bad credit.