Sorry to read that you are experiencing slow broadband speeds. I know how frustrating this can be.
As Kippies mentioned there is an issue with the downstream power levels with them being too high. For this I can arrange an engineer appointment to adjust these for you. I've sent you a PM (purple envelope icon, right corner) requesting some details.
There is also a high peak time traffic fault in your area which is causing slow speeds. The reference number is F003395649 and with a review date of 14th December.
Engineer Visited - Attenuation sorted but speed still disastrously slow
Had an engineer visit as Downstream power was too high. Attenuator put on the modem. Speed is still a complete disaster at anything close to 'peak' times. Get 50-60 Mbps at about 6am, otherwise it's maximum 4Mbps. What on earth is going on?