Resolved it seems.
Some cheeky bugger has cloned my cable modems mac address and has been using my connection on the sly! Spoke to a very helpful bloke called Daniel in tech support who found the problem straight away... the 2 calls previously (both to india i think) brought nothing up like this... infact they insisted it was my fault because I had p2p software installed.
Anyway they're sending an engineer round with a new modem tomorrow afternoon.. everything will be sorted then I guess
