Terrible apathetic service

I cancelled my landline at a Telkom store in December 2017 because the signal on the wireless phone is so bad, that neither I nor the other person on the line can hear each other. Despite me cancelling this, I am still being billed for a service I cannot use. In fact, I now use a VOX VoIP phone, which is crystal clear, and am paying VOX for this excellent service. I also have a fibre contract with VOX and am receiving excellent service. I have made several other attempts to cancel the Telkom landline contract, including over the internet, calling the call-centre, going in to Telkom stores, sending emails, having people at Telkom stores send emails. I have exhausted all options!!! What more can one do??? I did the internet cancellation on 16 June 2018, and even after receiving a reference number ( ********** 1), there is still no progress. So how does a reference number help when no-one cares to follow it up??? What is the point of it??? I have a whole audit trail of emails and contact people, but that evidently doesn't help. Apart from this I was being billed for a fibre contract with Telkom, which I do not even have with Telkom!!! Terrible service and tantamount to *****ing. If this is Telkom client service, then I might as well save myself the future anxiety and cancel my other contracts with them!!!