Lack of service: Trusc WiFi service

I had my Wi-Fi installed during July 2024 by Trusc WiGi and had a package of 6mbps which cost R399 per month , but since the installation I have endless problems with connectivity as it is buffering. I contacted them numerous times and was informed that I need to upgrade to 10mbps, which I did and must pay R799-00 per month, but there was no change in the connectivity and it buffers even more now. When I did a speed test it shows the upload speed is 4.3mbps and the internet speed 190Kbps. How can you use the internet and watch tv with these low speeds. I contacted them several times, but their customer service is non-existence. I don't recommend Trusc to anybody.