hi I have had 3 phone calls this morning from a lady claiming to be from bt. she has said my virgin broadband is from a bt server and there is an issue and she needs me to make some changes on my pc over the phone. I told her im with virgin but she said server is bt. I contacted virgin through live chat and they said don't worry it sounds fake. but this women has just rang me again saying if I don't do this my broadband will be tuned off. is this a scam or not. I told her I would contact virgin which ive done but she still saying the same.