I just received the same phone call, and I am on the Do Not Call list. For those of you that don't know this, you can register with donotcall.com with your phone numbers and email addresses. It doesn't always work, as evidenced by the above phone number, but it significantly attenuates the situation of pesty calls.
Received 3 missed calls and voicemails. Said they were calling for O'Helen and Ruben to confirm timeshare appointment. I keep trying to call back to tell them they have the wrong number but it's just busy.