Sorry to read you are unable to achieve the 100 Mbps broadband speeds.
I would like to help further and check your connection for any issues, however I am unable to see any network details at the moment.
Can you post your router information for me please, for us to check over? To do this type in 192.168.0.1 in the address bar, no need to sign in, on the top right you will see router status. Within here you will have downstream, upstream and network log. You can copy and paste this information, that would be great.
Also, are you testing the speeds through a wired or wireless connection?