No or slow service for 6 weeks and counting

I have had issues with my Telkom internet line since it was installed almost a year ago. With constant fault reporting and even a replacement modem, my problem never went away. On the 2nd of September 2017 I reported a fault on my line because of intermittent or no service with fault number 239CTK020917. Today is the 12th of October 2017 and although I have service again, its so slow it might as well just be off. I have called Telkom at my own cost multiple times and every single time I'm told the fault has been escalated, or its in hand with the cable department or a technician has been signed and my issue is still not solved. On Monday 9 October I called again and the fault was escalated, I was also put through to the Billing department to ensure that the correct credits will be allocated to my account and I was ensured that they are aware of the fault & credits will be allocated accordingly. Today the bill amounts went live on the online system and believe it or not, I'm billed for the full amount of my monthly service. I then called the call centre again and was told that a technician has been assigned from the cabling department. Same bull story as usual. I then demanded to speak to a manager and as per usual, no one is available but will call me back. Will believe that when I see it. Telkom, If my fault is not sorted before COB today, please cancel my service, refund me my monthly fees and installation fees and I will get someone who is competent and reliable to provide me a service.