I still get charged for a service I dont even have

I requested to cancel my Telkom ADSL line and internet because Telkom didn't debit the correct amount from my account. Now I have a back-lock of short payment to pay. I requested that my Telkom account needs to be canceled to give me time to pay my account. I completed a cancellation form 29/02/2016. After my request is send my account needed to be canceled 30 days after my request. Today is the 20/04/2016 and my account is still not canceled. I stopped the debit order end of march because the account needed to be canceled. I still receive statements with charges for a service I don't even have (my internet is cut off), that includes \levy\" charge and admin fees. Then someone at telkom call center also told me my account cant be canceled because I am on n 2 year contract. That is not what I signed up for when I opened a account at Telkom in Cresta Mall. I was explained its a month to month contact and when I want to cancel my account I need to complete the cancellation form.It seems like Telkom is full of lies and steeling peoples money due to lack of professionalism and customer service. I don't want anything to do with Telkom because if POOR service. Hope someone can do something"