Have you been with NOW over 10 days?
Are you using Wi-Fi or Ethernet for gaming? If it’s Wi-Fi the signals can be split to which should improve the speed
Alternatively give the broadband team a call if your past the 10 day part and tried everything in the link above.
Number to call can be found in my signature below.
FYI that I do not work for NOW, just a NOW customer trying to help