Telkom does it again!

I had a case (***7) with Telkom Mobile that had been pending for almost 2 months, in which I had cancelled a new contract I took with them for a new handset, and they deemed my cancellation to be valid and received SMS confirmation on 24/09/2015 that my contract has been cancelled. On 02/10/2015, I was trying to apply for a new contract with a different service provider & to my surprise, I was told I couldn't do this as Telkom has listed me as a bad payer on ITC. The sam day I called the call center and I spoke to a Manager/Supervisor by the name of Brenda who confirmed that indeed my cancellation was valid and that no monies are owed to Telkom by me and all penalties were waived by Billing department. She further advised the only thing she could do is send a mail to the persons in Billing to assist urgently and that no new case needed to be logged. A week later, I received no feedback and called the call center again on 06/10/2015. I spoke to Karabo the supervisor who told me I now needed to open a case (***1) which till this day has not yet been attended to. I'm sick and tired of the horrible service and delays from this company. Please can this be sorted for good! Please