Lady named Alex Willson rang my mum saying that the telephone company was taking $20 out of her bank account without her knowing. They appeared to have a reasonable knowledge of her banking details which made her furious. They wanted to sell her a blocking agent device for approximately $200. She stated she didn't have that money even at $50 a week. Mum said to ring back in a weeks time. After talking to me and I trying to ring them, we came to the conclusion it was a scam. They refused to give me their name when rung.