Just received an automated call from "Shirley" saying that my internet service will be disconnected within 24 hours as my ISP address has been compromised and to press 1 to be put through to a technician who will sort this out.
This is a known scam so don't ever respond other than to put the phone down.
I had a such a call in February but I'm posting this as I know that at least one other forum member got a similar phone call on Monday so it looks as if many people are getting these calls at this time.