Who called from 2394714817

They call and dont say anything.  This has been going on for a couple of days now.  I called them back and it states its some guy name Norm  tried to leave a message but the voice mail box was full.

Caller hangs up when call is answered Message @ number says mailbox is full

Constant phone calls from this number. I answer..they hang up.a Cape Coral phone number

Calls every day at different times of the day. Apparently trying to find out when someone is home so a real person can call their solicitation.
I won't answer.  Caller I.D. says Cape Coral FL

he say's he looking for donations for support of the FMY police dept.
asked how he got my unlisted number.then i hung up with no logical answer.