Bad Service and Unprofessional behavior

I canceled my R59 router contract with Telekom before my debit order in July in Corkwood store in Uitehage. Firstly their service was poor and was assisted by a lady and said my contract was canceled. She wanted me to do an upgrade but refused. I asked whether there's no proof to show that it has been canceled and said no. Come 20th July Debit order went off. I reversed it later on the debit order went off again decided to leave as, I thought maybe it was suppose to go off as the final debit order. Today, Telkom debits R202 in my account, for what? Am actually disgusted by this because, I knew it will happen since, I asked for a cancelation proof. Please cancel this nonsense and provide me with a cancelation letter to finalize this matter.