The last tech to visit my home told me they had installed the WRONG grade of cable from the street to my flat. Its overhead to a pole in the driveway then underground inside a PVC pipe from the pole to the flat.
I ditched cable TV because it kept cutting out and resetting the decoder every few hours and sometimes several times an hour. Now that's gone my cable internet has improved a lot but still don't get much more than 80-100kb/sec on my Lightspeed 40 plan which is supposed to be 10mb/sec.
I have a friend on their 1gb plan and she often gets much faster downloads than I do.
I have rung several times but they don't seem over interested in solving this problem.