They called twice today while I was working.  Did not pick up, and no message was left.  Checked the number online to confirm spam/scam, then blocked it.

I wish phone service providers would do more to help get rid of these annoying, unwanted calls. Or at least give us the ability to block an unlimited number of phone numbers. With Verizon, I can block up to 100 numbers, but I filled that up in no time flat. I can also block an additional 250 or 300 numbers directly on my phone, but even that fills up amazingly quickly. :-(

From GBL Gift Card.  No message.

He never stops calling and when I answer he doesn't say anything so I hang up and he immediately calls back

Maybe someone can actually speak to them to get some real business information from them.  They called my mobile phone and since I don't give that number to anyone, I simply answered with "Please put me on your Do Not Call List" and they hung up.  Since they called my mobile, I could take them to court over it.  I've always wanted to do that :) So someone get me their details.

Received a call from this number. Nobody answered after I said hello. I blocked the number!