Who is your phone line with at the moment?
The LLU question is less important than getting almost anywhere rather than where you are now. I like the way the same firm can tell you your line can't do more than 0.5Mbps in one breath, and in the next guarantee 3.5Mbps if you pay them more.
Which exchange is it please? The link to what samknows
says would be good. The reason I ask is to see what else is available to you. Surfwise Variety runs on the TalkTalk Business Wholesale system and you may not fancy that. Though it does seem to be a lot better than TT itself, just as many non-LLU ISPs are better than BT Total.
I agree with MrSaffron that there seems to be a problem on your line, possibly at your end. If you could plug the router into the test socket, on the wall at the back in this pic
, then take the stats again, we will know more about that. Just use the short ADSL cable of the router - no plug-in telephone extension cable to reach it.
With that attenuation, as he says on ADSL(1) around 7Mbps connection should be possible, with download speeds of 5-6Mbps. So "summat's oop!"
On (non-LLU or LLU) ADSL2+ you could perhaps even get another couple of meg above that.
So the stats from the test socket please ,
. That will tell us if you have a home wiring problem.