Stop screwing with your settings, stop letting BT screw with your settings, its at BT were the problem exists, they are cuasing it, there is no way on earth all these BT customers all suddnely made mistakes with there setup and can no longer DCC. Its the ISP (by isp i mean beyond your control) and thats that, no matter what they happen to say.

PS: to get a non indian tech support simply ask for one, saying you can not understand there accent, and need a native english speaker, I have never had a problem being redirected to a local regional representitive, dont feel embaressed about it, the companies would rather have you ring once and use a local rep, than ring 6 times because each time you get no where because of language difficulties.