Thanks for posting and welcome to the community. My apologies for the broadband issues. Upon doing a system check, all of your downstream power levels are out of specification. This will need a technician visit to the property to sort out.
I shall send you a PM now to get some details and arrange this.
Whenever you have a problem with your PC or broadband, don't waste time trying to diagnose what's wrong as a reboot of the PC or hub/router often resolves the problem. A pinhole reset should be done if a reboot doesn't work, just keep pressure on the pin for a good 30 seconds.