The phone number is listed on http://www.kingswayadvisory.net/contact/ but I doubt this is the person making the calls.
Phone : +1-202-555-0119
Email :
[email protected]
According to Wikipedia (http://en.wikipedia.org/wiki/555_%28telephone_number%29) this is a fictional telephone number and is not supposed to be allowed, so I think that website and the spammer making these calls both happened to invent the same phone number.