App**** for cancellation 3.5 months ago

I have sent my cancellation form the FIRST time to telkom on 25 August 2017 and numerous times after. Each time I call them or do the online chat, I resend the cancellation form. The last feedback I got was that no case was created. I have since cancelled by debit order and now Telkom has billed me for some lawyers fee. Explain what else must be done to cancel a contract that is past its 24 month period????