Not solving internet performance.

Up to 8 April 2024 I was a very satisfied Afrihost customer, but I have been struggling with my 500Mbps fibre line since 8 April 2024. I locked several requests for assistance and provided speed and ping tests showing that my 500Mbps line sometimes operates at less than 2Mbps with high ping and packet loss. I never get close to 500Mbps. It is worse in the evenings. Calls are closed without the problem being fixed. Every time I have to log a new call I get to a different operator. I requested several times for details of a Manager with whom I can address the issue with, but operators just talk it away and say they will escalate it themselves, but line is not fixed. I did not want to go through the hassle of getting another ISP, but seems I am not given any choice.