SPAM

Same thing no message if you miss the call or hang up if you answer

They call every week and never leave a message. Mostly later in afternoon

Rings evevery few days no message left.

Same thing - hang up when you mention your business name.

they continually call me and hang up without saying a word

Got a call today and they didn't leave a message.

I have a four calls from this number in the last few weeks.  No Messages, no one ever talks then they hang up.

No message is left and the number is not familiar to me

They have been calling my work number and hanging up as I pick up the phone, but the last time i said hello, rather than saying my name and company name, and they began their spiel. They are after donations.