When I'm in the mood, I LOVE these phone calls.
The last one that I had, told me that they were phoning on behalf of my broadband provider. When I asked them who, they replied that they were a separate company that represented, BT, Virgin Media ....etc.
Anyway I pretended that I was following his instructions - after a while I stopped him in his tracks and said something was up. I told him that a picture of a big yellow banana boat had just appeared on my screen and underneath was some writing. The writing said, "do you think I just came in on the last banana boat"? I asked him if he knew what it meant. He said he didn't know what it meant and he even told me that he was googling it - I nearly wet myself lol.
I kept him on the line for approx half an hour, until his supervisor came on and was quite upset that I'd been wasting their time. She reckoned that their "company" was legit and that when you ring your broadband helpline, you get put through to them as they handle all the technical help for all the broadband providers - yea ...... whatever.
Anyway, back on topic, it's a scam :)