"how these people know that information and how they got our numbe" Everything they need to know including pictures of your house with your car in the driveway, your age, your income, your phone number(s), where you might have lived in the past and who you might be friends with is all easily obtained off the internet and by purchasing data mining. Do a search of your name and you will see what I mean.
Remember that it will now get worse. You see police departments will be using license plate readers and will send that information off to private companies. These companies will then know where you are, what time you were there and will be able to figure out who you were visiting and then they will sell it to the highest bidder.
I am 24 and getting calls for Medicare, I am getting these calls and still have not gotten any student loan debt scams. Should I take this as a sign for something?