Telkom has the worst service I have ever experienced.

We have a Telkom adsl line at home for Wifi purpouses. We have a 10 mbps line and are having problems with the speed on the line. Our speed varies from 0.2 mbps to 1.2 mbps . I first logged a fault at the Telkom call center on 16 April 2019 and since then I have made hundreds of calls, sent e-mails exc. but nobody ever comes back to me or solves the problem. According to one of Telkom's own technicians they are overloading the line in our area. Therefor the slow speed. It is impossible to speak to a supervisor or manager - they just have you hold on for hours until the phone cuts off - so it is impossible to escalate the matter. They ever told me at one stage that our rooter is faulty. I went and bought a new rooter, just to still have the same problem. This is the worst service I have ever experienced. We are paying for a product that we can't use and there is absolutely no service for this product.