Phone Scam?

Received phone call with the following information 10/26/14:

Keith Munaz from California employee number IE7626

From Norton Technical Support with return phone number 866-276-7957 ext 3012

Indicated that we had "Suspicious activity on Network (personal)" on Windows 7 that could get into our PC

Indicated that we had to buy more Norton packages and wanted us to give "Name, SS, financial detail, and credit card detail

Indicated that we had more than 10 computers on our network (we only have a couple) - asked for our IP address.

Called again the next day

I don't know how the scam connected our phone number to Norton, our use of Windows 7 -- have others had the same contacts??

Thank you