Fttp upgrade

Level 3
Level 3
Today my area has been added to the fttn to fttp full fibre upgrade plan. I'm only getting 43Mbps on fttn. This is all it's capable of, there's been many issues over the years with it.
I've been wanting a 100mbps plan (maybe faster). How do I go about getting my link upgraded to full fibre and the faster speeds as per this new upgrade path. This obviously isn't a standard plan change as I will end up paying once again for something the current technology can't deliver on.
Thank you