Same problem here, Orange/wanadoo NEVER admit liability for intermittent breaks, everything going nicely, then bang ! out it goes for minutes at a time. I think a lot of the trouble is them consolidating their network and switching main lines to their servers. I've had enough and I'm off to Newnet next tuesday. At least they offer a one month contract so I can get out if necessary.
Dont hang about, get out, vote with your feet!