Continues to debit my account after cancellation

Ive sent notification of cancellation for my telephone line through to the cancellations department in January 2016. Telkom still manages to debit my bank account for R189. This will be the 3rd month of having this debit order. Ive contacted them without reply on the matter. Im not willing to hold on for hours to get to maybe speak to a consultant that will refer me to the next person. I want my money back. Im not using your service!