Who called from 4237338022

this number called twice, and I've recently received similar abuse from another number, that one a Tampa, FL based number.  I googled it and found "Mountain Area Communications" based in Sneedville, TN.

I received calls from this area code several times this month. The first six digits were the same "423-733", but each time they called, the last four numbers were different.

This number called and the lady said i have won 500 $ which will come by post. Alli have to do is answer 3 questions. I hung up.

They called me at 8:45 at night with a loud party it sounded like in the background (I head laughter) and then they told me I won a $500 online shopping spree. They knew my home address (they called my cell phone which is under a friends name) and wanted to know if I would like SIXTEEN different magazines and all I had to pay was shipping and handling.

They tried saying that my credit card company gave the number to them. They couldn't tell me if I had a Visa or Mastercard, so I lied and said the opposite of what I had, gave them the wrong age and then told them to get rid of my info or I would call the police. If you're going to scam people, wouldn't you at least try to block their number?
The number they called from was 423-317-9049 but under the same Mountain Area Communications name as the one above. Call the main office and no one ever answers...

Also, a reverse number search shows that the number comes up as a private residence. Go figure. What kind of company would have a residential phone number? A not-so-smart con-artist.

I got a call from these people early in the morning. I actually gave them a CC number but now I am afraid that I have been scammed. Does anyone know more about this as I am now a bit scared of the consequences. I am elderly and now I believe that I have been scammed.
Please anyone with information on this company, help me determine if I have been scammed.