Bt wizard /pc wizard scam!

We have had 3 phonecalls from these fraudsters today.
So just a warning to those that dont know..yup its a scam.
I asked for the phone no and was cut off the first time....
Then had good fun putting it on speakerphone and letting the foreign gentleman speak to the main user of the computer in question ...Iona is just 4 and told him about cbeebies website....cut off.
3rd time I asked for the company name to be spelt out slowly....and the address...
Dont give them remote access to your computer as they can do whatever they like once they get in!