Nbn50 speeds

Level 1a

So at home with a wired connection the fastest speeds i am getting is around 32mb per second and lag spikes while gaming and am paying for nbn50. Is there anyway i can get toward 50 mbps ps? I have fibre to the node, then copper to house. Would a better modem help my case? Is it possible to get a contractor to run fibre to the node? Where do i go from here?

Thanks james