I received a call from a lady saying they were BT and my internet connection had been compromised and action was needed to remove intruders. They sent an email with a PIN number which looked genuine and said this was proof they were BT so I would know it was not a scam. They asked me to go to a fake BT security site . it was all logo'd up to look like a BT site but the graphics resolution did not look right to me, they asked me to go to security on the menu and select Mac security and so I refused to go any further. I asked them to email me instructions to follow when I could access MyBT. They said they would and then hung up. so far no email. So genuine call or Scam?