Thieving TELKOM

I have just received an invoice on a data contract that was cancelled almost a year ago in a telkom store. After numerous efforts and unknown number of trying to resolve this issue with call centres i am fed up of the pathetic service. I have had to constantly reverse deductions made by telkom on my account at R30 per reversal. When i ask to speak to a supervisor or manager, i am told that they are busy and would call me back. Not 1 of the many conversations has ever seen a supervisor or manager get back to me. I cant contact the store directly according to the agents. This according to the credit bureau has created a negative credit rating for me. As far as im concerned, Telkom are a bunch of ******* that prey on people not willing to put up a fight. Fortunately i am and will get lawyers to fight this further. I even have proof via e mail that states that my issue was resolved yet the problem still exists.