R1000+ a month for 20mbs internet that is only running at 1mbs!

In 2020 Telkom set up an ADSL connection in my home. Last year a technician from Open Serve was on site to repair a line due to the heavy storms. For the last two days, my 20mbs uncapped line has been running on under 1mbs. I’ve been on the phone with Telkom agents for hours trying to get it sorted. In the end they all tell me “oh Telkom doesn’t service ADSL anymore so we cannot log a fault for you”. So you telling me an internet connection that you installed, that I am paying more than R1000 for, is not working & you refuse to help me? I explained to the agents that no one ever made me aware that I should change to an LTE package as there is no Fibre in our area. The agents that were on my premises last year did not say a single thing about this either. I also explained that my entire house runs on WiFi. Tvs, Alarms, cameras, gates etc and now I’m being left in the lurch. I’ve requested a change to LTE but no one can assist me from Telkom. I am now sitting with a useless ADSL line that I pay R1000+ for every month which does not work. In what world is this right?