All I will say is I am sorry to hear you have been having this problems speedfreak. I have read your posts and it is sad to see it has been taking so long to resolve the issues.
I hope it all gets sorted soo, because once it is all in order it is awesome. I am on 50mb in Birmingham and get a reliable connection.
This is a speedtest I just did prior to testing
I have had the occasional problem but has been resolved quickly. It just sounds like you have one of those rare problems that are so troublesome.