I already tried all these things.Infact engineer came to fix it and not able to find a fault. He check all connection and reboot system few times with no luck but if you want I go and reboot the system now.
Thank you for reaching out to us in our community, I am sorry to see you are getting a lower than expected speed when running speed tests.
I have had a look our end and run some full diagnostic checks, I cannot see any issues at all all your levels are exactly where they should be.
You can set up a free “Broadband Quality Monitor” to continually monitor the state of your connection and record any network dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with us. Make sure you un-check the “ignore ping from WAN side” box in the settings if you see a wall of "red" - note it will take an hour or two to start seeing a sensible picture here is the link you will need.