Not getting the Full Fibre spped I was promised

[Graam55]

Hello I was wondering if anyone else has this problem. I have tried and tried to get help from Talk talk but for one reason or another after being passed round numerous people I get cut off.

I have had full fibre installed which promised speeds of 150 mbps I only rarely get this mostly struggling around 80- 100 mbps which is not good enough to play the online games I wanted to play.  I was offered a new router but then the process of being transfered to the correct department to order this cut me off. 

[KeithFrench]

Which make/model of router do you have? What speed do you get if you connect a PC or similar with an Ethernet cable directly to the ONT in place of the router. Are the speeds low on just WiFi-connected devices or Ethernet ones as well?