Thanks for posting and a warm welcome to the community.
My apologies that you are experiencing slow broadband speeds. I know how frustrating this can be.
From checking your connection, the downstream power levels are too high at + 12 dBmV. For this I would like to arrange an engineer appointment to adjust these for you. I've sent you a PM (purple envelope icon, right corner) with some details for you to confirm please. Once you have replied I can go ahead with the appointment.