Who called from 3473808327

I have gotten 2 to 3 calls every other day. no message left. on the do not call list???

again, getting calls on my cell. no message left. am on the no call list.

Received call from 347 380-8327

Got a call about 10 minutes ago. No message. I am in Mass.

I called the number back .... I completed a survey on Amazon and they gave me a "free" gift choice for completing the survey.  I filled in my name and phone number for my "free"  gift of  some anti aging stuff where the bottom line was  I would be charged about !40 a month for my "free" gift if I took no action within 30 days or so.   I erased my name and number from the site but they obviously have their tracking robots because they called.