Telkom Mobile Should Cease To Exist

I am truly disappointed and appalled with Telkom Mobile. I don't even know why they are allowed to operate. They are clearly failing in the mobile space they should stick to one problem. I regret the day I opened a contract with them. I only have a data contract with them, nothing else but I just got billed for a voice service. I have checked the invoice information and there is no explanation of where the charges have been accumulated. This according to me and the law is *******. They are billing me for a service I do not have. I have tried calling the call centre to query this but it seems the Telkom Mobile call centre does not exist because there is no one answering, I have been holding for more than 10mins on 2 separate occasions. Can the regulator please just step in and force Telkom Mobile to shut their doors. Their receptions is non existent, their service is horrible and their billing just does what they want. They are robbing us!!!