Fishing call. Trying to get bank account information. "You've won a gift certificate of 25.00 to be wired into your account."

This company keeps calling me after many efforts to tell them not to call me. They say something along the lines of you have been selected to win a free 25 dollar gift card for shopping at a Walmart, Kmart, and or Walgreens. I have told them numerous times to stop calling me or I would report them to the FCC and contact an attorney. They want to much information asking me for my bank account number. They keep harrasing me and calling me repeatedly.

Caller says he is from a telephone book advertising department, verifying our address and phone number.  Says he is not selling anything, and that we already have this service - just wants to verify our company information.  Still calls but hangs up after we answer.