Welcome to the forums and sorry to hear you're getting poor speeds. I've just checked your connection and can see that there is a contention fault in the area under ticket F004272350. This will cause slow speeds at peak times and is due for review 03/05/17.
While checking this I could also see that your upstream power levels are too high which will also cause poor speeds as well as disconnections. We'll have to book a technician visit to adjust this and I've just sent you a private message to arrange the best time. To view your private messages just click the envelope at the top of the page.