Contract cancelled

Good Day <br> I've cancelled my contract with Telkom in August for September, I've only discovered this morning when I called the Telkom's contact centre that my contract is still active. I've been experiencing problems with Telkom's data and modem I have been billed for more than 6 months without any data. After calling the contact centre I receive an email from Telkom stating that I should go to the branch where my cancellation form was completed according to the sms I should send it to customer care but no email address or fax number was given.