Horrible technical and customer service

I am in a complex that has Clear Access as a fiber provider, I unfortunately cannot use any other fiber provider like Vumatel etc, I have moved over to 4 different ISP's and every single time I am having an issue, I am with a new ISP now and I have been with them for almost a year, I am paying for 200/200 and rarely receive as high as 100/100 on my line and most of the time I have a high latency and a serious amount of packet loss, clear access sends out their technician twice and tells me its my router, I have now bought 3 routers and have tested on about 6 routers and I am still having the issue, while the technician is there I can hear him outside my flat speaking to someone else from his team talking sh*t about me. In all honesty the only thing that I could do about this is move out as the body corporate will not change over the fiber providers, but just felt I needed to vent and let the community know the possibility of the service they will receive if they choose Clear Access. I would move over to Clear Access as the ISP as well but the issue is they charge R2000.00 for installation fees which does not make sense as their infrastructure is already installed in the complex and all they would need to do is just take my line from a roaming pool.