Impossible to cancel a soft cap...

I requested that my ADSL line and cap be moved over to someone else last year August. At the beginning of March this year I was notified that I am blacklisted as I have not paid my Telkom account. After a visit to the Telkom Stellenbosch branch on 12 March 2016 I was advised that they had cancelled my soft cap, but that I needed to pay the amount due of around R1,000. I paid it, knowing it would be quicker to pay the amount than dispute it. Since then I have made 2 calls to the Telkom "customer service"line to confirm the cancellation and to request that a letter be sent to Transunion to clear my record. I was promised that this would be done immediately, and yet last week I received yet another Telkom bill.... When I cann the service desk, I am told that they cannot help me, and whn I go into a store I am told they cannot help me.... This is honestly the most useless company I have ever dealt with!!!! I urgently need my record cleared with Transunion as I am applying for a home loan. WHO can help me??