Calls at least twice a day. I haven't answered but they never leave a message which usually means one thing...telemarketer. I've auto rejected them. Poof! Be gone!

It's a marketing company called Yaletown Group.  Canadian based, but with an office in Seattle.

This number calls twice a day and never leaves a message.  When I try to call them back, they don't answer and the mailbox is full.  It is extremely annoying and disturbing.

I have received at least two calls a day from this number for months.  Recently there have been late evening calls.  I never answer.  A message is never left.  How do I make the calls from this number stop?