Reduced bandwidth and heavy packet Losses during congestion periods (6pm-9:30pm) every day

I am using Home-Connect fibre (50/50Mbps). Fair performance when the line is quiet. Terrible service during congestion (6pm - 9:30pm) every evening of every day. I get way less than half the bandwidth I paid for, most of the routers on the international trace path start to lose packets horribly. Logged a ticket for the packet losses with several trace routes but they have no idea how to fix and they eventually closed the ticket without resolution. Anyone planning to use their internet for gaming between 6pm & 10pm should not use Home-connect. You should be fine with streaming if you buy enough bandwidth such that when it is inevitably halved at these times you will still be able to use it