Either they’re using a number from your phone’s contact list to call you, or they are calling numbers from your wife’s contact list. The contact list on one of the two phones has been accessed.
This phone scam is no surprise, I get delivery failure notices in my email listing many addresses that have been spammed by someone identifying my address as the sender.
Thanks for the information. It is probable that someone has accessed my contact list as it was my wife’s phone number that appeared on my phone as the caller. The only problem being when I spoke there was nobody at the other end of the phone, though it sounded like there was someone there. I’ll contact my daughter as she is on my contact list. I’m interested in whether or not she has been contacted.