Cant get any response from Telkom

I have sent Telkom numerous emails to both [Email Removed] and [Email Removed] asking to cancel my landline service. I get automated responses saying that my email has been received BUT that is where it ends. They simply do not come back to you. I have tried calling them on 10210 and 10213 but after holding on for 40 mins gave up They are quick to have you sign contracts and debit order but when it comes to service cancellations they simply don't want to assist you.