non existing service delivery

I sent a cancellation request to Telkom on the 9th of March but still today I had no one attending to the cancellation. I phoned them and they said I must just wait some one will phone me back. I went to the shop and they said they can see on the system a cancellation is loaded, someone will phone me! it is now 2 months later and no one comes back to me. I blocked the debit orders and still no one phones me! It seems like Telkom is the only company where you cannot speak to the retention department directly. There is a reason why Telkom is cheaper than other service providers...