STILL being billed for cancelled service

I cancelled my landline and adsl in September but I’m still receiving invoices. I have followed the correct procedure via email. And I have spent countless hours on the phone. And complained on hello peter. What does it take to get to speak to the right person to correct this mess? It’s so unfair that your procedures for cancelling a service are so unbelievably ridiculous that you cannot phone someone or go into a telkom shop. I’m livid. I’m not paying for 2 months that I’ve been billed for a service that I have not used on principle because it’s been cancelled. Ridiculous that a telecommunications company can not communicate telephonically!!!!!