I actually had the same problem, I was so out of it that I confirmed the zip code. I've cancelled my card, but I was hoping you could tell me how you dealt with the problem, since your post was made about a year ago I thought you might be able to help.
They told me my last four numbers to a current credit card ..... how did they get that? Told me I won a gas card, I told him NO not to send anything to me, SCAM
I just got a call from these people. Said they were from Vista (something) and that I had won free gas cards for using my Master Card. I told them I did not want their gas cards because these are always scams. They said inside the envelope will be a "free offer" for something - I did not give them a chance to tell me.....I just told them NOT to send me anything!!!
I got seven calls within four hours day. I checked, found the number to be related to a pest call. DO NOT listen or answer. I called Verizon and the number is now blocked on my phone.