I found a good way to deal with these idiots.  I leave my fax machine on.  I can see who is calling and if I don't answer the phone quickly the harassers get a nice screech in their ears.

they called me from a 780 area code the other day, now from this number. I got that I was specially chosen for a prize, press 1 to accept.. blah blah....scam

This number has been calling my phone for the past three days....luckily I don't take calls I don't recognize....when I phoned it back....it says it's a marketing company and allows you to leave a message....I was very clear to not call my number...time will tell if they actually do not....what a pain!

they called me from a 780 area code the other day, now from this number. I got that I was specially chosen for a prize, press 1 to accept.. blah blah....
scam

It's a marketing agency in London, with their apparent DNC line in California. They call after your local dealership has handed out your information to anyone they feel like so they call repeatedly call with car info, survey, or unnecessary service reminders. I would call the dealer you bought the used car from, or car shop you had work done at and let them have it for giving out your number.

This number keeps calling our house every day around the same time for about a week now and when we answer no one is there...